Just had a couple extra 75 watt CFL grow light bulbs. So, I decided to use them on the lower branches. Along with my big CFL’s and three 600 watt led panels. I was lying in my flower room about two hours after the lights went out making sure there was no light leaking in, when I saw one of my 75 watt CFL’s glowing. I thought…WTF? Really? I unscrewed it. Still glowing. F@#K! So, I unscrew them both and put them in a box in the closet every night. All my other lights are fine. I looked at the plant closest to the light and the branches were all weird looking so I cut them off. Fearing hermaphrodites. Weird huh?
Kinda makes sense. Long time arguments have gone on about wether it’s more energy efficient to leave lights on or turn them off and on as needed. They actually use more energy to turn them on than to run them for several hours (incandescent bulbs were this study). To leave cfls slightly charged could be one of their energy saving features. Just a guess tho.