Pheonix 250W DE Bulb Replacement

hilde123 · 01/01/2009, 09:21 PM

I have two 250 watt Pheonix DE bulbs that I run 6 hours per day, what is the maximum recommended time between bulb replacement?

Garage1217 · 01/01/2009, 09:53 PM

at 6 hours a day, approx 2 years & do not let anyone tell you different unless you want every last bit of output all the time.

downhillbiker · 01/01/2009, 11:08 PM

+1 for above. you should be good for a couple years. calfo runs his bulbs until they burn out. if you read over this article you will find that bulbs lose about 25% of their initial output in the first 3 months. if you dont replace them every 3 months you might as well wait 2 years. after 18 months it only drops to 70% and after 2 years i believe it was 66%. this study is only for PAR, not color. you will have some spectrum shift, but not too much, and phoenix already have a nice blue color, so if they turn into more of a true 14k looking bulb instead of a 20k looking bulb, then that is ok with me.

http://reefkeeping.com/issues/2007-04/ac/index.php

01/01/2009, 09:21 PM	#1
hilde123 Registered Member Join Date: Sep 2004 Location: Orlando, Florida Posts: 625	Pheonix 250W DE Bulb Replacement I have two 250 watt Pheonix DE bulbs that I run 6 hours per day, what is the maximum recommended time between bulb replacement?

01/01/2009, 09:53 PM	#2
Garage1217 GET OFF MY LAWN Join Date: Jul 2007 Location: Globally Posts: 5,863	at 6 hours a day, approx 2 years & do not let anyone tell you different unless you want every last bit of output all the time. __________________ No great genius has ever existed without some touch of madness ~ Aristotle If we knew what it was we were doing, it would not be called research, would it? ~ Albert Einstein I'm just as bent as ever. Hellishly so ~ Captain Jack Sparrow Current Tank Info: Systems and goodies by Lee-Mar / Coralvue / Neptune Systems / Jager / Spectrapure / Cree / Meanwell + more!

01/01/2009, 11:08 PM	#3
downhillbiker Registered Member Join Date: Feb 2008 Location: Salt Lake City, Utah Posts: 2,831	+1 for above. you should be good for a couple years. calfo runs his bulbs until they burn out. if you read over this article you will find that bulbs lose about 25% of their initial output in the first 3 months. if you dont replace them every 3 months you might as well wait 2 years. after 18 months it only drops to 70% and after 2 years i believe it was 66%. this study is only for PAR, not color. you will have some spectrum shift, but not too much, and phoenix already have a nice blue color, so if they turn into more of a true 14k looking bulb instead of a 20k looking bulb, then that is ok with me. http://reefkeeping.com/issues/2007-04/ac/index.php __________________ The friendliest GIANT you'll ever meet. Current Tank Info: 200g Marineland Deep Dimension (Lumenmax Reflectors/Dual PFO 400w/Radium 20K) and 2xFrag Tanks (One TEK T5 fixture and one MH, Galaxy/Phoenix) on same system w/100g sump w/6"x100g DSB, AquaC EV-1000 Skimmer, Reeflo Barracuda return pump