I purchased the lights as I am environmentally conscious and investment wise. I wanted a light that could be on for hours and not make me feel like I was throwing money out the window. I liked the look and functionality of the lights and with consistent feedback -- I was sold. My personal experience with the lights are solid and identical to the positive feedback.
As with most LED's, I was skeptical about how bright these lights would be. The lights are very bright by any standard -- and at 10 watts per light (20 watts total), the investment will pay off in the years to come. I feel that the brightness is at least equivalent in perspective to a 500 watt set (I am sure the 500w would be brighter, but unless you put them side by side you would probably be happy with the LED). The light diffused very well and not at all like a spotlight.
The light is not reddish or yellow like many CFLs... More like moon, stadium, or prison lights. So, if you are looking to bring back memories of romance, reminiscing of your broken days of football (or band), and/or your 22 months at Parchman -- these lights are for you! For the security aware, these lights will just direct any threat to toward your less protected neighbors house.