T5's: A cautionary note

<a href=showthread.php?s=&postid=7192206#post7192206 target=_blank>Originally posted</a> by ASH
From IceCap:
A factoid from: http://aboutlightingcontrols.org/about.shtml

The source: The Lighting Controls Association (LCA), an adjunct of the National Electrical Manufacturers Association (NEMA), is the association dedicated to educating the professional building design, construction and management communities about the benefits and operation of automatic switching and dimming controls. The benefits include energy savings, flexibility and higher-quality building environments. ........

The fact: "Ambient temperature: Note that initial rated light output for T5 and T5HO lamps is based on peak output at an ambient temperature of 35 Ã"šÃ‚ºC (95 Ã"šÃ‚ºF), whereas T8, T12 and circular T5 lamps are based on 25 Ã"šÃ‚ºC (77 Ã"šÃ‚ºF). This characteristic of T5HO lamps may make them more suitable than T8 in some industrial applications in which ambient temperatures may be higher."

My conclusion: the canopy air in our hoods often exceeds 95Ã"šÃ‚ºF and always exceeds 77Ã"šÃ‚ºF. Nevertheless, with a fan removing lamp heat, which far exceeds either recommended temperature, the lamp itself can operate at optimum output. The 95Ã"šÃ‚ºF target only helps in setting a number in a static environment that anyone could reproduce and verify. Doing the same for a scenario involving heat extraction by use of fans makes it impossible to sum up with a single number. You'd have to account for fan placement, temperature of replacement air, speed of fan ( or with an IceCap variable speed fan - where was the probe set) proximity of lamps to each other, .... . Not an easy benchmark to create.

General observation: This thread is too much about rhetoric and too little about facts.

Andy
Andy do icecap overdrive the t5 lamps?
 
horkn, I was asked to deliver this message from Grim Reefer to you:

"You're kind of wreckless with your comments and accusations. First off I have been recomending Ice Cap equipment for a few years in the forum (simple to search and see). The only thing they ever gave me was a 4x54 watt system in November to test the effectiveness of their ballast on the more standard size lamps. I also was very up front about the fact they had given me the equipment to use.

Now the way you plaster aqualux lighting's link in every friggin T5 thread since the creation of time I'll ask, what are they giving you? They only way they beat Reefgeek's or Ocean encounter's price (which are both forum sponsor's) is if the customer asks for a price match."
 
Gibson,

Yes, the T5s are overdriven on IC's ballasts. However, that's not a bad thing if you have everything wired properly and are careful with your selection of corals.
 
Andy

Andy

<a href=showthread.php?s=&postid=7192519#post7192519 target=_blank>Originally posted</a> by Reefmaniac1
Gibson,

Yes, the T5s are overdriven on IC's ballasts. However, that's not a bad thing if you have everything wired properly and are careful with your selection of corals.
I did not know you were Andy from ice cap.javascript:smilie(':bum:')
 
My alter ego ;)

Oh yeah, one more thing to tack onto my original reply to you: Make sure that you also have the hood vented adequately.
 
Well, I suppose the best thing now, since we have ASH talking with us, would be to simply ask...

Are there any studies that have been done comparing the long term operation/longevity of T5 bulbs running on IC ballasts?
 
I remember reading on one of his threads that he'd been testing them on a tank for 24+ months with, I think, 90% of the original lumen output still intact.
 
Perhaps one of the reasons for the reports of early diminished output would be because of the rumored low longevity of the GE 6500K bulbs??? Perhaps tests using these bulbs were the reason for diminished output.

So how can IC run a bulb with more heat, yet not diminish the output of the phosphors?
 
Reefmaniac1 does his homework. When I first started playing with T5HO lamps I thought overdriving them would cause an explosion. They seemed too bright to last. As a result, at IceCap we began a 12 month speeded up time trial where the four GE 54-watt 6.5K lamps were packed into a stock AG lighting hood and the torture began. Each night they would cycle on and off four times. I discovered the temperature to output relationship first hand by not allowing heat to dissipate from the lamps I could watch the light levels drop. Turn on a fan and they brightened back up. At the end of the year the lamps looked like hell, but when lit still came in around 94% of initial lumens. Unlike 'normal' fluorescent lamps, day one is initial lumens, not after 100 hours of break-in.

We didn't go to market on a hope they'd work. We ran them in a way I would hope no one would do purposely. I never thought of GE as the premier lamp manufacturer in the world but as these came from the recently rebuilt Hungarian plant they were state of the art. More recently, the GE line has an environmental kick too, the mercury is locked up in the discarded old lamp rather than leeching out as they did historically. The new UVL lamps will likewise have this feature.

As to depreciation of actinic lamps, the rate is faster but of less significance. Most tanks exceed ocean levels in their actinic light portion of the spectrum. You can go by looks (to your eye) as they mostly provide aesthetics for us. There are poorly made lamps we've tested that look beat in 3 to 6 months. But these lamps looked like the phosphorus was sprayed on in a hurry when still new. Cheap bulbs are not only made in T-12 sizes.

I will qualify my statement, when overdriving T5HO lamps, if you expect 18 - 24 months, use well made lamps in a well vented hood. Always run a fan when the T5HO lamps are lit. Always use a ballast that shuts off current to a dead lamp and use SLRs to get the most out of your T5 lamps and put the light where you want it.

Andy
 
<a href=showthread.php?s=&postid=7192508#post7192508 target=_blank>Originally posted</a> by Reefmaniac1
horkn, I was asked to deliver this message from Grim Reefer to you:

"You're kind of wreckless with your comments and accusations. First off I have been recomending Ice Cap equipment for a few years in the forum (simple to search and see). The only thing they ever gave me was a 4x54 watt system in November to test the effectiveness of their ballast on the more standard size lamps. I also was very up front about the fact they had given me the equipment to use.

Now the way you plaster aqualux lighting's link in every friggin T5 thread since the creation of time I'll ask, what are they giving you? They only way they beat Reefgeek's or Ocean encounter's price (which are both forum sponsor's) is if the customer asks for a price match."

well, coming from someone that can't post nere, i take that at face value as well.
If he were around here, he would realize that i do not plaster around the aqualux name at all. I only mention it when people do not understand that ther are alternatives to just tek , and icecap reflectors, and that they will match anyones price, as well as having the least expensive good t5ho retros available. I have never been given anything for free by aqualux, i have posted what i paid for my retro and compare that to what other companies sell theirs for.

I am all about equal or better performance for less price. thats why i like aqualux. It seems most people are very happy with the aqualux sold items, esp once they realize how much $$ they save.
In fact, i ordered a set of bulbs from reefgeek, because they were less money, and had the bulbs on hand i wanted. but, i really dont think its that big of a deal to ask for a price match. its kinda like asking a sponsor for our RC discount. If you dont feel like asking, you will pay more.

also, when aqualux gets bigger, they will probably be a sponsor.
 
<a href=showthread.php?s=&postid=7194138#post7194138 target=_blank>Originally posted</a> by hahnmeister
Perhaps one of the reasons for the reports of early diminished output would be because of the rumored low longevity of the GE 6500K bulbs??? Perhaps tests using these bulbs were the reason for diminished output.

So how can IC run a bulb with more heat, yet not diminish the output of the phosphors?

what is funny is that the GE is widely regarded as the best available t5ho bulb as far as PAR, and longevity. maybe the guy that had his ge diminish that much so quickly did have a problem with his connections.?
 
<a href=showthread.php?s=&postid=7194793#post7194793 target=_blank>Originally posted</a> by horkn
well, coming from someone that can't post nere, i take that at face value as well.
If he were around here, he would realize that i do not plaster around the aqualux name at all.

Last I checked, just because he can't post doesn't mean he can't read and keep up with the threads. Just pointing out that obvious little bit. :)
 
<a href=showthread.php?s=&postid=7195407#post7195407 target=_blank>Originally posted</a> by Sparkss
Last I checked, just because he can't post doesn't mean he can't read and keep up with the threads. Just pointing out that obvious little bit. :)

umm yeah.


thats true, but you missed my point i guess.

there's a reason he isnt here.
 
From IceCap:
horkn - I'm not looking to get into a posting battle but suggesting TGR was in anybody's pocket is ridiculous.

I find it funny that when you deny plugging a brand name you repeat the brand name 5 times in your retort.

I just visited http://www.aqualuxlighting.com/workhorse5.html and I'm concerned that they spec a WH for T5HO lamps yet clearly state that when it comes to End of Life Protection - No EOL Circuit exists.
IMO, when recommending sites that sell applications that could be dangerous, add a 'buyer beware'.
Andy
 
Great point ASH. The No EOL concerned me from the beginning with the Workhorse 5 or 7. Sometimes you get what you pay for and a lighting mishap can be nasty, to say the least. Its Icecap for me and I have no problem paying the extra money for a quality product. In fact, looking into your 4x54 retro system right now. Thanks
 
No EOL circuitry? Wow! Strike 5 against Workhorse. Not that I would have ever really considered the things, but man...that's NUTS!
 
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