I've been anti-LED in EMs. Until I played around with them in my Abra Ca Dabra...all GI remained incandescent and the majority of the inserts, too. I colour-matched the red moving spot under the plastics at the top drops and it looks pretty sharp. The backglass had signs that it was starting to peel, so I tried Comet's retros and was pleasantly surprised with the result...great product. In certain situations, I think EMs and LEDs together are acceptable...as long as the GI glow of the incandescent bulb remains the same.