I also am going for the red light look in my Orchid House which does receive quite a bit of natural light but I wanted to boost that. I ordered direct from China for 1/2 the price of those available here in the UK. I got a 270W one which is at the end of the OH and then I discovered the long bar type on the left of the photo which is only 44W but covers my grow area better without too much wastage. This is all very much trial and error for me but I have put the bar one 12" above the leaves and the more powerful one 24" above. So far everything seems happy.
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