I have my orchids growing under some LED strips from Active Grow. The plants are thriving, and several Phals now are sending out flower spikes. This leads to a question about the best distance between the lights and the plants. The lights are now about 6" above the tops of the plants. If left where they are, the flowers will be up to or above the lights. If I lower the shelves to keep the flowers about that distance from the LEDs, the leaves will be much further away and will get less light. Any advice?

Welcome to the Orchid forum!
Bill here on the forum grows under lights, surely he can answer your question.

@Bigbill?

RH, I have a simple answer. Grow the Phalaenopsis by growing the best roots that you can and the most leaves that you can.
It is not about flower height really. Any that bloom under the lights and have flowers up in the tubes, should be taken out from under the lights and displayed around your home.
With Phalaenopsis, the leaf color tells you if the light is correct.
If the leaves are:
Granny Smith Apple Green then the light intensity is correct.
If the leaves start to get to be a real yellow-green in color, it is an indication of too much light intensity. Lower them by 3" and re-evaluate after 6 weeks.
If the leaves get to be a darker forest green color, they can be closer to the tubes. Move them 3" closer and then evaluate in 6 weeks.
I hope that this answers your question..

Well, I'm totally confused.

About?

Bill - Thanks for the response. I had moved some of them to other places in the house as the flower spikes grew, and I'll continue to do that.

Rich

Hey Rich, that won't hurt their growth at all!
Look at it like this, let's just say they spend 9 months under lights and 3 months out from under in bloom. I always tell people to arrange their plants under lights according to where they spend the majority of their time.
If you were to arrange according to spike height, you could end up with say 30 Phalaenopsis under lights at 30 different heights. That would be a nightmare.
Take care. Bill