T the loach AC Members Aug 6, 2018 1,104 541 120 May 12, 2019 #11 FreshyFresh said: This fade happens with LED fixtures as well, but takes years. Click to expand... I've seen Leds fade from day 1 as well. Literally. Led manufacturers are estimating it, cause it hasn't been on the market that long. T5's on the other hand, do have real life data available.