With winter, by orchids are getting a lot less light. I wouldn't be worried except that they are in full shade all the time now due to a large palm tree and lemon bush outside this east window.
I have bought and built two LED growlights to use as a suppliment to my higher light orchids. You can see an example
here. (it's the 14 watt kit)
Some plants know the seasons by amount of photoperiod, while some adjust due to temperature changes. Is there a way to find out which orchids will need the light reduction to signal winter?

I don't want to accidentally trick one of my orchids to thinking it is spring with the extra lighting.
Jay
P.S. I will let know what I think of the LED growlights as I use them more. So far I like them. I have them on a timer to go on around sunrise and off around sunset.