I've searched and haven't found much help on this. I have a 40 breeder and I'm running 2x 250 watt HQI MH Phoenix 14k bulbs fired by 2x Lumatek ballasts. I will be growing a lot of SPS in the tank any with the Phoenix's insane par output, I'm afraid I will burn the coral. The lights are about 8 inches from the water and I can't raise them any higher due to the height of the hood. I'm thinking of going with the XM 20k HQI bulb but have been reading that the output isn't very good. With the depth of a 40 breeder not being that cosmic, in you opinion, do you think the XM 20k bulb be sufficient enough for SPS?
I have had awesome luck with " single ended" 400 watt XM 20k on my 60 cube but from what I have read, the double ended bulbs are getting mixed reviews.
Thanks in advance
Tom
I have had awesome luck with " single ended" 400 watt XM 20k on my 60 cube but from what I have read, the double ended bulbs are getting mixed reviews.
Thanks in advance
Tom
