...over the past several years but did not like two aspects of CFL, slow warm up in many and poor quality of brightness for my old eyes, and the damnable mercury in them. So began replacing CFL with LED now that they are so much nicer of a light source. Love'em in the house and in my tiny boat. The best application I have found for them is replacing CFL floods in ceiling cans with LED's which are instant on/brightness and SO much better light!! When I turned on a row of can lights to see something I hated having to wait five minutes...or so....for the light to develop and it STILL was crap.