I also have been very pleased with my replacement led bulbs inside the Grayhawk. The light output is about the same as before , perhaps a bit softer on the eyes. I got a good deal after shopping around on e bay and they really put out a lot less heat at the fixture. Not so much to lower the a/c output, probably, but much safer in those up close fixtures such as the spot light near the headboard, and by the overhead kids bunk.
On a side note, I also replaced my 65 W floods in our home with led flood replacements that were on sale recently, and I like those also. When the costs of these household bulbs come down in price, I will change everything to save $$$.