A lux meter for measuring illuminances in work places.

The lux (symbol: lx) is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is used in photometry as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface. It is analogous to the radiometric unit watts per square metre, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human visual brightness perception. In English, "lux" is used in both singular and plural.^[1]

Explanation[link]

Illuminance is a measure of how much luminous flux is spread over a given area. One can think of luminous flux (measured in lumens) as a measure of the total "amount" of visible light present, and the illuminance as a measure of the intensity of illumination on a surface. A given amount of light will illuminate a surface more dimly if it is spread over a larger area, so illuminance is inversely proportional to area.

One lux is equal to one lumen per square metre:

1 lx = 1 lm/m² = 1 cd·sr·m^–2.

A flux of 1,000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1,000 lux. However, the same 1,000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.

Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12,000 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area to the same level of lux requires a greater number of lumens.

As with other SI units, SI prefixes can be used, for example a kilolux (klx) is 1,000 lux.

Lux can be used as a measure of the brightness of a light source, for instance of a star or a distant light bulb. A star with apparent magnitude 0 is 2.54 microlux outside the earth's atmosphere, and 82% of that (2.08 microlux) under clear skies.^[2] A magnitude 6 star (just barely visible) would be 8.3 nanolux. A standard candle (one candela) at a kilometre would be 1 microlux, about the same as a magnitude 1 star.

Here are some examples of the illuminance provided under various conditions, or by heavenly sources:

Unicode has a symbol for "lx": (㏓). It is a legacy code to accommodate old code pages in some Asian languages. Use of this code is not recommended.

Relationship between illuminance and irradiance[link]

Like all photometric units, the lux has a corresponding "radiometric" unit. The difference between any photometric unit and its corresponding radiometric unit is that radiometric units are based on physical power, with all wavelengths being weighted equally, while photometric units take into account the fact that the human eye's visual system is more sensitive to some wavelengths than others, and accordingly every wavelength is given a different weight. The weighting factor is known as the luminosity function.

The lux is one lumen per square metre (lm/m²), and the corresponding radiometric unit, which measures irradiance, is the watt per square metre (W/m²). There is no single conversion factor between lx and W/m²; there is a different conversion factor for every wavelength, and it is not possible to make a conversion unless one knows the spectral composition of the light.

The peak of the luminosity function is at 555 nm (green); the eye's visual system is more sensitive to light of this wavelength than any other. For monochromatic light of this wavelength, the irradiance needed to make one lux is minimum, at 1.464 mW/m². That is, one obtains 683.002 lux per W/m² (or lumens per watt) at this wavelength. Other wavelengths of visible light produce fewer lumens per watt. The luminosity function falls to zero for wavelengths outside the visible spectrum.

For a light source with mixed wavelengths, the number of lumens per watt can be calculated by means of the luminosity function. In order to appear reasonably "white," a light source cannot consist solely of the green light to which the eye's visual photoreceptors are most sensitive, but must include a generous mixture of red and blue wavelengths to which they are much less sensitive.

This means that white (or whitish) light sources produce far fewer lumens per watt than the theoretical maximum of 683 lumens per watt. The ratio between the actual number of lumens per watt and the theoretical maximum is expressed as a percentage known as the luminous efficiency. For example, a typical incandescent light bulb has a luminous efficiency of only about 2%.

In reality, individual eyes vary slightly in their luminosity functions. However, photometric units are precisely defined and precisely measurable. They are based on an agreed-upon standard luminosity function which is based on measurements of the spectral characteristics of visual photoreception in many individual human eyes.

Use in video camera specifications[link]

Specifications for video cameras such as camcorders and surveillance cameras often include a minimum illuminance level in lux at which the camera will record a satisfactory image. A camera with good low-light capability will have a lower lux rating. Still cameras do not use such a specification, since longer exposure times can generally be used to make pictures at very low illuminance levels, as opposed to the case in video cameras where a maximum exposure time is generally set by the frame rate.

[edit] Non-SI units of illuminance

The corresponding unit in English and American traditional units is the foot-candle. One foot candle is about 10.764 lux. Since one foot-candle is the illuminance cast on a surface by a one-candela source one foot away, a lux could be thought of as a "metre-candle", although this term is discouraged because it does not conform to SI standards for unit names.

One phot (ph) equals 10 kilolux.

One nox (nx) equals 1 millilux.

SI photometry units[link]

References[link]

External links[link]

• Radiometry and photometry FAQ Professor Jim Palmer's Radiometry FAQ page (University of Arizona).

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Method Man
December 21, 2010
Background information
Birth name	Clifford Smith
Also known as	Meth, Tical, Johnny Blaze, Methtical, Shakwon, Iron Lung, Hot Nikkels, MZA, John J
Born	(1971-04-01) April 1, 1971 (age 41)[1][2] Staten Island, New York City, United States
Genres	Hip hop
Occupations	Rapper, actor
Years active	1990–present (rapping) 1995–present (acting)
Labels	Def Jam
Associated acts	Wu-Tang Clan, Redman, Erick Sermon, LL Cool J, The Notorious B.I.G., DMX, Xzibit, Shyheim
Website	method-man.com

Clifford Smith (born April 1, 1971),^[3] better known by his stage name Method Man, is an American hip hop artist, record producer, actor and member of the hip hop collective Wu-Tang Clan. He took his stage name from the 1979 film The Fearless Young Boxer, also known as Method Man. He is one half of the rap duo Method Man & Redman. He won a Grammy Award for Best Rap Performance by a Duo or Group for "I'll Be There for You/You're All I Need to Get By" with Mary J. Blige. In 2007, the writers of About.com placed him on their list of the Top 50 MCs of Our Time (1987–2007).^[4]

Method Man appeared in the motion pictures Belly, How High, Garden State as well as a minor role in The Wackness. More recently, he appeared as a crewman in George Lucas' film Red Tails. On television, he and hip-hop collaborator Redman co-starred on the short-lived Fox sitcom Method & Red, and he had a recurring role on HBO's Oz as Tug Daniels and as Calvin "Cheese" Wagstaff on the acclaimed HBO drama series The Wire.

Early life[link]

Born in Staten Island, New York, on April 1 , 1971, Clifford Smith divided his childhood between his father's Long Island residence and his mother's home in the Park Hill section of Staten Island aka Killa Hill.^[5] He has two sisters, Terri and Missy.^[5]

Rapping career[link]

[edit] 1992–96: Enter the Wu-Tang (36 Chambers) and Tical

As Wu-Tang Clan ascended to hip hop stardom, Method Man was always one of the most visible members of the collective. He was one of only two members to get a solo song on the group's debut album Enter the Wu-Tang: 36 Chambers and he was the first to release a solo album under the Clan's unusual contract which allowed its members to release albums under any record label (Method chose to sign with rap label Def Jam). Method Man's solo debut, Tical (1994) was critically acclaimed and well received, entering the American charts at #4 and eventually selling in excess of one million copies. That album featured the hit single "All I Need" which was later remixed featuring Mary J Blige, which won a Grammy "I'll Be There for You/You're All I Need,"). during this time Method Man also became close friends with The Notorious B.I.G., and was the only guest rapper featured on his debut album Ready to Die. He was also featured on Spice 1's album "AmeriKKKa's Nightmare" on the track "Hard 2 Kill". In 1995, he was also featured on "Got the Flava" off Showbiz and A.G.'s album Goodfellas. In 1996, Method Man appeared on Tupac Shakur's album All Eyez on Me, on the song "Got My Mind Made Up" alongside his rhyme partner Redman, The Dogg Pound (Daz and Kurupt) and Inspectah Deck (Rebel INS), whose verse did not make the released album version (although his nickname "Rebel INS" can be heard as the song fades).

[edit] 1997–98: Wu-Tang Forever and Tical 2000: Judgement Day

On June 3, 1997 the Wu-Tang Clan released their Grammy-nominated multiplatinum double CD Wu-Tang Forever, the long-awaited follow up to 36 Chambers. The album has sold over 8.3 million copies to date worldwide.

His second solo album was Tical 2000: Judgement Day, released in 1998, which was heavily influenced by the apocalypse theories surrounding the forthcoming end of the millennium, and which featured myriad guest appearances from his fellow Wu-Tang MCs, proving for the world that Method Man is in fact America's most blunted(with the help of Red Man). The album was certified double platinum. Other guest appearances include Lisa "Left Eye" Lopes, D'Angelo, Chris Rock, Mobb Deep, Redman, and brief cameos from Russell Simmons, Bishop Don "Magic" Juan, Janet Jackson, and Donald Trump. The album sold better than his first fueled by the party track "Judgment Day" and the D'Angelo collaboration "Break Ups 2 Make Ups", earning Platinum and Gold certifications in the U.S. and Canada respectively. Reviews for the album were mixed and its long runtime and abundance of intermittent comedy skits were widely criticized. Producers on this album included True Master, 4th Disciple and the RZA.

[edit] 1999–2000: Blackout! (with Redman)

Method Man was part of the very successful Hard Knock Life Tour with Jay-Z, Redman, Ja Rule, and DMX. During this tour, Method Man & Redman recorded Blackout!, a light-hearted, bass-heavy, profanity-laced, party record with an EPMD-evoking emphasis on funky beats and the mischievous wit and cool flows and good rhythm of the two MCs. The album reached platinum status quickly, both in the U.S. and Canada, fueled by "Da Rockwilder", "Cereal Killa", "1, 2, 1, 2", "Tear It Off" and "Y.O.U.". This album also featured three previously released tracks on which the two collaborated.

Their success would lead the duo on to star in movies and TV shows, become product spokespersons and household names, but also associated them with marijuana use in the media. The most immediate results of their success was their co-starring roles in the major motion picture film How High, their endorsement deal for Right Guard, Redman's starring role in Seed of Chucky and a short-lived sitcom on Fox Television entitled Method & Red.

[edit] 2000–04: The W, Iron Flag, and Tihkal 0: The Prequel

The Wu-Tang Clan released The W on November 21, 2000 and Iron Flag on December 18, 2001. The W received both critical and commercial success for the group, while Iron Flag did receive some but not to the effect of The W. The efforts earned two more platinum plaques for the Wu-Tang Clan.

In 2004, Meth released his third solo album Tical 0: The Prequel, which featured the hit party single "What's Happenin'" with Busta Rhymes. Hip hop critics voiced their displeasure with the album, many agreeing that Tical 0 felt like generic party rap and featured too many mainstream guests, detracting from his own performances. Regardless, this album sold reasonably well and was certified gold record by the RIAA relatively quickly, but would not see the platinum success of his previous solo releases. There was trouble even before the album's release when Method apparently complained to the press about excessive interference from Def Jam over the album's beats (Meth supposedly desired more input from Wu-Tang leader RZA). On its release, many fans and critics were taken aback by its strong "mainstream" or "commercial" sound, highlighted by the guest appearances of pop-rap stars like Missy Elliott and P. Diddy, two artists that are involved with much different facets of rap music.

P. Diddy was one of the executive producers for the album, although Meth later voiced his displeasure with the final product. "On the third LP, it was suggested (by Def Jam) to bring in Harve Pierre and P. Diddy. Who am I to argue? Puff knows how to sell some records. But that wasn't the direction to go in, and I know that."^[6]

[edit] 2006–07: 4:21... The Day After

Method Man at the 2007 Eurockéennes.

Method Man's fourth album, entitled 4:21: The Day After was released in August 2006 with a star lineup of producers featuring Havoc, Erick Sermon, Scott Storch, Allah Mathematics, Mr. Porter, and, most importantly to Meth, RZA. This time around, a more focused Method Man went back to his hip hop roots and both hip hop fans and the media took notice. He did an interview on the ItsHipHop.Tv.^[7] Despite this being one of Meth's strongest solo efforts to date, the album failed to do well commercially due to it having no single or video, which Method Man has held discontent towards his own label for. However, he has been touring strongly all over the world to promote the album, and has appeared onstage with fellow Wu-Tang member Inspectah Deck, as well as New York up and comers Saigon, and Gat Murdah. Meth contributed various reasons for the problems between him and his label, Def Jam. While he puts most of the blame on personal agendas in the Def Jam offices, Meth did take some blame, himself, for giving into his record label.

In early May 2007, Method Man's camp leaked the street single "New York New York" which became a popular track on the internet.^[8]

[edit] 2007–10: Blackout! 2

On March 27, 2007, Redman confirmed on BET's Rap City: Tha Bassment that the sequel to How High, How High 2, is currently being written.

In an April 10, 2007 Onion AV Club interview,^[9] Redman hinted that there would be a second collaborative album with Method Man, with work beginning in midsummer or early September.

In early 2008, a remake of the Smoothe da Hustler and Trigger tha Gambler classic Broken Language was released to the internet by the duo entitled Broken Language 2008, fueling rumors of a Blackout! sequel coming soon. This rumor was further fueled by the duo while performing in Gainesville, Florida at the University of Florida. A Blackout! 2 LP was scheduled for a December 9, 2008 release but was recently pushed back to the first quarter of 2009, with a new release date on May 19. Bun B has confirmed that he will guest star on Blackout! 2 – in April 2009, a single has been released named City Lights, produced by Nasty Kutt ^[10] Also producers such as Erick Sermon, Rockwilder and Pete Rock have announced their presence on the album.

The duo has finished their Still High tour with Termanalogy, the Alchemist, and Evidence of Dilated Peoples.

[edit] 2011–present: Crystal Meth

Crystal Meth is Method Man's upcoming fifth studio album.^[11][12][13] The album has no confirmed release date. The Crystal Meth was first announced before Method Man began working on his and Redman's sophomore collaboration album, Blackout! 2. In the liner notes of that album, it was given a scheduled release date for 2009. The album, however, was further postponed until it was later mentioned in an MTV interview it would be released in early 2010.^[11] no update on the album's progress or release date has been made. At a concert on the 23 of December 2010 Method Man told the crowd to look for his album in March 2011. However the album was pushed back to an unknown release date.

In a recent interview with The Come Up Show following a recent performance in Canada in April 2011, Method Man replied with this regarding his current 'weed-loving' image:"When you get older and you've got kids and your kids are going to school and you know [their] teachers...and they see how active you are and concerned [you are] with your kids' education or well being, it's hard to sit there and be taken seriously if people are always talking about he's always high...which is totally not the case," he said. "When I first came out, I was young, we were doing our thing, we smoked a lot...and we didn't care if the world knew. Now, I have to use more discretion because of my kids. This is not for me; everything I do is for them now, so I use a bit more discretion and I don't put weed as a forefront any more."

On October 5, 2011, a new single from Method Man, titled "World Gone Sour (The Lost Kids)", was released on iTunes.^[14] Recently, he confirmed that the album will come out next year and will have the usual line-up of producers including RZA, Rockwilder, Erick Sermon, 3rd Digala of Digem Tracks and some other new underground producers he's begun to work with.^[15] He also expressed a desire to work with Odd Future frontman Tyler, The Creator.^[16] It was recently announced via Facebook that Crystal Meth will be his last album & to be fully produced by RZA.

Acting career[link]

In the early 2000s Method Man began a career in acting. He has had recurring roles in critically acclaimed television shows such as HBO's Oz as Tug Daniels, HBO's The Wire in which he plays Prop Joe's nephew Cheese, The Twilight Zone and CSI: Crime Scene Investigation. He and Redman hosted a pilot on MTV called Stung. He has made numerous appearances as himself on TV shows such as Mind of Mencia and Chappelle's Show.

Method Man portrays Drops on CSI, a wealthy Las Vegas party promoter who clashes with the CSI team, specifically investigator Nick Stokes, in their investigations involving his clubs or entourage. His first appearance on CSI as Drops was in the 2006 episode "Poppin' Tags". He resumed the role in the 2007 episode "Big Shots" and again in the 2008 episode "Drops Out".

His first prominent role came in 1998 with the film Belly along with fellow rappers Nas and DMX. He has since added many credits to his name, including roles in the films Garden State, One Eight Seven, and many others, with starring roles in the feature films such as How High and Soul Plane. On March 27, 2007 Redman confirmed on BET's show Rap City that the sequel to How High was being written. The script for How High 2 is being written by Dustin Lee Abraham of CSI, who also wrote the first movie. In 2005 Method Man also had a cameo in the horror movie Venom, where he played a deputy who shortly into the movie is killed. He appears in the 2008 movies The Wackness and also, Meet the Spartans.

Method Man stars in the episode "Snitch" of Law & Order SVU as the main antagonist. The episode was first broadcast December 4, 2007.

Method Man has made an appearance in the Def Jam series of video games. In Fight for NY he voiced Blaze, one of the main characters. In Icon, he voiced Gooch, a major character in the storyline. In Underground, He voiced Meth, one of the major characters. He made a guest appearance in the music video for the 2003 "If I Ain't Got You" by Alicia Keys, where he played the role of her boyfriend. He also appeared in Beanie Sigel's music video "Feel It in the Air", where Method Man played an undercover cop leading an operation against Sigel.

Method Man has fallen back from pursuing more acting roles after the situation with his sitcom on Fox left a bad taste in his mouth,^[17] and now mostly just acts if the project is being handled by a friend of his, as was the case with CSI and The Wire. He also played an arsonist and a wealthy executive as well as main antagonist in an episode of the fox TV show The Good Guys.

Method Man appears as a hip hop business mogul in an episode of Burn Notice.

Method man had a cameo appearance in the 1997 film Cop Land as a physically violent fleeing criminal that throws Peter Berg's character off of a New York rooftop. Method Man has also appeared in the TV drama Wonderland, as a patient in a mental hospital.

Method man plays a small role in the 2011 film "The Sitter" starring Jonah Hill. In 2012 he played crewman "Sticks" in George Lucas' movie Red Tails about the Tuskegee airmen.

Other ventures[link]

Method Man appeared in the 1995 documentary entitled The Show. There is a memorable scene in which Method Man, on a train in Japan, gets into an argument with U-God and Ghostface Killah, over camera time, radio interviews, and clothing mishaps.

In 2006, Method Man appeared on the MTV reality game show Yo Momma in the first episode of Season 1.

Method Man is the first of the Wu-Tang Clan to produce a series of eponymous graphic novels for Hachette Book Group USA's imprint Grand Central Publishing^[18] (to be followed by GZA and Ghostface Killah).^[19]

Personal life[link]

He became engaged to his wife in 1999 and they married in 2001.^[5] He has three children: two sons (born in 1996 and 2001), and one daughter (born in 1997). Method Man also has collabed with Rochester rapper "Dale Mahoney" on his project "Jordans&Drugs" in 2012.^[20]

Legal issues[link]

On Thursday May 17, 2007 Method Man was arrested in New York City on marijuana charges. His Mercedes-Benz convertible was pulled over at the Battery Tunnel en route to Manhattan, and when he rolled his window down the officer noticed a strong smell of marijuana. "It was like something out of Cheech & Chong. He rolls down the window and the smoke would choke a horse," a source later said.^[21] The arresting officer said he noticed two blunts and a plastic bag with more marijuana in plain view. Upon further inspection more marijuana was found under the driver's seat. The arrest was made at about 10 P.M. Thursday night near the Battery Tunnel toll booths on Hamilton Ave. in Carroll Gardens. He was charged with unlawful possession of marijuana, criminal possession of marijuana, operating a motor vehicle under the influence and driving an uninspected motor vehicle. He later made many public service appearances to try to make up for it, most notably at Abraham Lincoln High School in Brooklyn.^[22]

On October 5, 2009, Method Man was arrested at his home in Staten Island for income tax violations.^[23] He was accused of failing to file income tax returns for the state of New York between 2004 and 2007 and owes nearly $33,000 in taxes. On June 28, 2010,^[24] Method Man plead guilty to tax evasion and was sentenced to a conditional discharge^[25] and paid a $106,000.00 fine.^[24]

Controversies[link]

Wu-Tang management[link]

In 2003, Method Man criticized Oli "Power" Grant and Mitchell "Divine" Diggs, the managers of the Wu-Tang business.^[26] "Number 1 on my shit list right now is Divine from Wu-Tang management. He took something major from me that he had no intention of giving back."^[27] Divine is multiplatinum record producer RZA's brother who along with Oli "Power" Grant took over the business end of Wu-Tang around 1997.

Aside from the financial issues, Method Man was unhappy with the decision to bring Wu-Tang into the fashion world for a brief period of time with Wu-Wear, despite the brand being a major money-maker for the group. "When Wu-Wear started making shoes and sneakers and pants, it was shoddy material. I never rocked that shit."^[27]

Wendy Williams[link]

In 2006 Method Man had a highly personal and highly publicized conflict with TV talk show host Wendy Williams on The Breakdown, an internet show on ONLOQ.com. Williams talked on air about Method Man's wife having cancer, which was something he had wanted to keep very private and even her own family members had not yet known about. He said that people who lived next door to him didn't even know, but Williams had dug it up and made it public over the radio. Because of this leaked information, Method Man and his wife had many problems.^[28]

Williams also reported rumors that Method Man had even been having an affair with his wife's doctor. Method Man first heard of this while in recording sessions in Los Angeles.

Sean Combs[link]

During a concert in 2006, Method Man criticized Diddy's decisions on the posthumous The Notorious B.I.G. Duets: The Final Chapter album, saying that Biggie never would have worked with some of the subpar rappers. "They got niggas on that album Big would have never rocked with," Meth said of the album. "Musically, I ain't fuckin' with Puff Daddy".^[30] He also brought up the fact that he was the only other rapper that Biggie chose to have on his debut album Ready To Die. He was featured on the track "The What".

Previously, Diddy had been one of the executive producers for Method Man's 2004 album Tical 0: The Prequel, to which Meth later voiced his displeasure on the final product. From then on, he focused on production from within the clan and its closely tied collaborators.

Fox Television[link]

He starred in a Fox sitcom called Method & Red in late 2004, however after only a short time on the air the show was put on hiatus and never returned. Method Man later complained in the press about Fox's influence on the show's style, claiming that "there's been too much compromise on our side and not enough on their side" and bemoaning the network's decision to add a laugh track. Before the show even aired for the first time, he was telling fans not to bother watching it. He told the newspaper:

Discography[link]

Filmography[link]

Method Man filmography