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Old 06-09-2006, 09:16 AM   #21
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Originally Posted by phish7740
i was talking to my lfs and he doesnt like t5s

said that they loose 40-50% of luminens in 4-6 months. which means major $ on bulb changes since t5 bulbs are about $20+ each.

i have been looking into them and now rethinking either PC or MH


I've been reading around and everything says that the bulbs last anywhere from 1.5 to 2 years before they need to be replaced including the manufacture,This was the main driver for getting these lights.
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Old 06-09-2006, 09:36 AM   #22
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Quote:
I would like to know where he gets his data from....
I agree...remember LFS, sometimes it is better to get different opinions online...They just want to make money and I think MH are more costly bulbs, not to mention electric bill.
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Old 06-09-2006, 09:37 AM   #23
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The main issue with the bulb life is keeping the bulbs cool, especially if they are being overdriven by the icecap 660 ballasts. Provide plenty of ventilation and airflow, and the bulb life is supposedly well over a year.

Just a note, everything I've posted here is not from personal experiance, at least not yet. But rather from a couple of months of investigating which lighting I want to use on my 125 gallon tank I'm converting from freshwater. I decided on the 6 bulb 60" retrofit kit from reefgeek, with the icecap 660 ballasts. I built my own hood, with 4 integrated 90mm fans, open back for ventilation, and two ventilation 'vents' in the top of the hood. Hopefully all my research pays off!
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Old 06-09-2006, 01:42 PM   #24
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he is using them on his 20gal fish tanks.

thats what i thought that they are cooler temp and last longer.

390w pc 60" $285
300w mh+220 vho 60" $570
480w T5 60" $390

all from aquauniverse.com best prices i can find and they are only 1-2 days away shipping time.

http://www.bulbbarn.com/quicksearch....&start=0&sort=
this site says a 54w 48" 15K 4450 lum will last 3000-5000 hours which should be 12-14 months at 8-10 hours a day

more intersting reading
http://www.facilitiesnet.com/ms/article.asp?id=2075

and General Electric rates hours at 30,000 which is over 8 years.????this cant be true?
http://www.geconsumerproducts.com/pr.../06_T5_30k.htm

philips lighting website rates them at 20,000 hours also

from what i read i think the decrease in lumens over time is much less with T5 than MH
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Old 06-09-2006, 08:49 PM   #25
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my friend that owns a hydroponic store and sells t5 lights said that the bulbs will hold more luminens than MH over their 1-2 year lifespan. so basicly after a year the t5 will still be putting out 80% and MH onl 50%
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Old 06-09-2006, 08:55 PM   #26
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add in the cost for replacment and the Pro's far out weigh the Con's of going to T-5 lighting. plus they last longer...
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Old 06-10-2006, 04:57 PM   #27
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I have that nova extreme unit (216) and just replaced a 265 PC with it... huge difference.. the tank is waaaay brighter looking now, quite happy with it..
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Old 06-21-2006, 09:14 AM   #28
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YOu have all heard different stuffy but ever since I started in SW all I have read and heard was that PC are the longest lastign bulb and MH bulbs typically need to be replace sooner.

I have heard that PC need replacment each year and that MH last 6-8 months before replacment is needed. I am sure different bulbs and different setups will give different lifespans to the bulbs but I have never heard of a MH lasting over a year.

Again none of us are bulb experts but liek I said the majority of information I have run across is that the MH are great for reefs but they are more costly and need replacment more often than VHO or PC
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Old 06-21-2006, 09:55 AM   #29
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The T5 I have are just VHO lights, I bought the 216W ones too. It also has acitinc (sp?) and lunar lights.
I am curious of all the folks that just bought the T5 lighting, did you all get an algae bloom?
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Old 06-21-2006, 10:15 AM   #30
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i have to say that yes, i am getting an algae bloom now....
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