I ordered a bunch of LEDs to try out, and I ended up using them in all of my backboxes. I found that I didn't love the color shift that i was seeing so i ended up using about every other bulb as an LED. The heat is cut way down and i didn't lose much of the original look of the back glass.

I tried using them in the inserts, but only kept a few because they weren't color matched and didn't look great. It also drove me nuts when they would ghost with other lights that were flashing. My IJ looks good with the back box half and half.