scott1 wrote:
Thanks for the replies guys. I was thinking of going with the wafer looking one that Netboy posted. That just seems to make more sense to me in that all the light is directed down.
Oh, yeah, if you are going to use it in a ceiling light, and your fixture has room, go with panels like these that include the 921 wedge base adapter:

As discussed in earlier posts, there are many variations on these panels. I went with 6x8 arays (48 each 1210 LEDs) in warm white for my ceiling lights, and am very pleased with the results. Another choice would be a panel of 24 5050 SMD LEDs (the 5050 modules put out more light than the 1210 SMDs).
Most of these panels come with double back foam tape on the backside.