Lithonia Lighting has a very informative website relative to LED upgrades. I recently upgraded downlights from halogens to LED's and I was able to see the Lumens, CRI, and Color Temperature before committing myself. For my bathroom I chose 2700K and 700 lumens for each of three lights that were upgraded. Very pleased with the results.

Another option are LED panels. They are about 1/2" thick, with excellent light distribution and no glare. I chose Pixi brand (residence, not my shop). They are available in 12"x12", 12x24 and 24x24 in a range of lumens and Color temperatures.