[OGD] indoor light growing

Hi, I have grown orchids under lights for many years. I use the cheap 4 foot two light fixtures. I have them mounted two fixtures side by side to make a four bulb lighted area. I have always used the cool white bulbs and my plants grow and bloom great. Paphs, Phals, Cats even Ascocendas.

[OGD] Indoor light growing and 4' vs. 8' bulbs

Hi Mike, I'm impressed with the genera you're able to flower under cool lights, esp. the Ascos. How close to the plants are the lights? I think I'll try the longer days, (the longest I've done is 14 hours) which helped for sure, but I'm sure you're right about the 16 hr. days being the critical