First, congratulations on your growing!! Always a nice feeling that your plants are so healthy. Secondly, to your question, I think your plants should be fine that close to a cool light. I *think* heat would be the biggest concern of growing orchids under lights at that close of a range. LEDs will not produce heat - or very limited heat, so I believe it could help increase your grow area. I should say that I do not grow under lights, so those that do and have more experience here should chime in and tell you what their experience has shown. Good luck!