PDA

View Full Version : SE bulbs in low canopy


reefman77
12/24/2006, 09:47 AM
its about time for me to upgrade my lighting and I have a bit of a problem. I realy want to run 250 radiums on HQI ballasts but my canopy is only 8" high. I would be using a PFO dual HQI ballast and these pendants

http://www.marinedepot.com/md_viewItem.asp?idproduct=PF2653

I am worried about the bulbs being splashed with water and not getting enough light spread with the bulbs being so close to the water.

Do you think the radiums would work or do you think this setup would be a better choice?
http://reefgeek.com/products/categories/lighting/104666.html
i am running the 150 watt pheonix 14K bulbs right now and like the color but not as much as I like the radiums.

143gadgets
12/24/2006, 01:05 PM
IMO I think you will be ok. My bulbs are at max 5-6" off of the water.

foshizzle
12/24/2006, 10:25 PM
I run my bulbs about 7". you could also cut holes and let the pendants poke out the top of the canopy a few inches

reefman77
12/25/2006, 02:50 PM
thanks

do you think it would be OK to put an acrylic shield or something over the pendant. Im worried about splashing because I have alot of flow and my water surface is very turbulant.

would an acrylic shield lower PAR output substantialy

supertech3
12/25/2006, 03:16 PM
if you have only 8", the fixture will hang down how much closer to the tank? maybe 4" could be an issue with heat also

foshizzle
12/25/2006, 04:08 PM
<a href=showthread.php?s=&postid=8825416#post8825416 target=_blank>Originally posted</a> by reefman77
thanks

do you think it would be OK to put an acrylic shield or something over the pendant. Im worried about splashing because I have alot of flow and my water surface is very turbulant.

would an acrylic shield lower PAR output substantialy

acrylic will lower PAR a good bit.

Ti
12/25/2006, 04:50 PM
u'll b o.k

143gadgets
12/26/2006, 12:33 AM
Yeah the acrylic will lower the par. I have two tunze 6100s at 100% ina 75g (90x turnover). It is very turbulent in my tank and I experience very little if any splashing in the tank. Good luck!

vanmle
12/26/2006, 12:51 AM
My lights are about 6" above the surface of the water. I have two Tunze 6200 that cause a lot of turbulence but it is not the turbulence that causes the problem. My fish occassionally splash and the splashing cracked two bulbs over the course of about 1 1/2 years.