TropTrea
New member
1. I think 400 Watts is to much for a 40 gallon tank.
2. Since you already have the ballast what I would then use as frist choice the XM 10000K which gives a high PAR and a slightly bluer spectrum than the other high par bulbs. As a second choice I'd go with XM20000K with a lot lesser PAR than the other bulb but a much bluer look.
3. With the 400W bulbs you could raise the bulb considerably higher than if you used a 250W which will give you more even light distribution .
4. Now if you were suplementing with Actinics then I'd look at the EV or Hamilton bulbs.
Dennis
2. Since you already have the ballast what I would then use as frist choice the XM 10000K which gives a high PAR and a slightly bluer spectrum than the other high par bulbs. As a second choice I'd go with XM20000K with a lot lesser PAR than the other bulb but a much bluer look.
3. With the 400W bulbs you could raise the bulb considerably higher than if you used a 250W which will give you more even light distribution .
4. Now if you were suplementing with Actinics then I'd look at the EV or Hamilton bulbs.
Dennis
<a href=showthread.php?s=&postid=8510127#post8510127 target=_blank>Originally posted</a> by LRS
Hello Sanjay / Hahnmeitster,
I am currently setting up a 40g SPS frag tank, 36"l x 18"w x 16"h. I have a PFO 400W HQI ballast and a PFO horizontal SE pendant. What bulb would you suggest for "optimal" growth without compromising too much on esthetics. I was thinking of an Aqua Connect 400w 14K or XM 400w 10K/15K ( I don't know if 15K is available). What suggestions would you have? Also, How high above the top of the tank would the pendant give me an optimal spread? Your advice/comments will be very much appreciated!
Many thanks...