boodlefish
Premium Member
i totaly agree james.
just most arguments here seem to be over skimmiers like its the be all end all of reefing.
just most arguments here seem to be over skimmiers like its the be all end all of reefing.
<a href=showthread.php?s=&postid=13520723#post13520723 target=_blank>Originally posted</a> by boodlefish
.Shadowramy,
do you have any comparison pics between mh and t5?
so far this is the first coloration complaint i have heard, i thought the main diff was lack of shimmer
and can the simmer be retained by supplemental led's? just a thought.
<a href=showthread.php?s=&postid=13520335#post13520335 target=_blank>Originally posted</a> by jamesdawson
Boodlefish,
Sorry to shout but,
DON'T BUY A T5 FIXTURE WITHOUT ACTIVE COOLING!
I have run both an 8 bulb Tek and an 8 bulb PowerModul on a 120. There is no comparison between the two.
The Tek is a poorly engineered fixture that makes 1/2 the PAR of a PowerModul because Sunlight Supply didn't engineer in $20 worth of active cooling (a fan). So technically a 4 bulb PowerModul makes as much PAR as an 8 bulb Tek although its really just twice as much Par over 1/2 the area.
Teks are only really bright for the first 2-3 weeks, then as the bulbs cook from not being properly vented the Par drops off dramatically and your bulb life is compromised. There are other problems also with Teks/Sunlight Supply but lack of active cooling is the most important so I wouldn't reccomend a Tek.
The PowerModul on the other hand stays bright and your bulbs are going to be really good for at least a year. I had explosive growth/great colors with mine as compared to wimpy growth/mediocre colors with a Tek.
I'm sorry but I don't have any pics as they were on a computer that died last summer.
Good luck,
James
<a href=showthread.php?s=&postid=13523844#post13523844 target=_blank>Originally posted</a> by pito
So, what's the proper way to cool and vent? I'm going retro
<a href=showthread.php?s=&postid=13524561#post13524561 target=_blank>Originally posted</a> by jamesdawson
T5s have a "coldspot" which is the end of the lamp where the manufacturer's writing is. What you need to do on a retro is have all the lamps oriented so the coldspots are at the same end and blow a fan across that end and it will hit all the coldspots. You want the temperature of the coldspot to as close to 113 fahrenheit as you can get it consistently. This keeps the rest of the bulb(s) at 95 fahrenheit which is the optimal temp for making PAR and bulb longevity.
Best way to measure the temp is with a non-contact thermometer, ie laser pyrometer. You can get one for like a $30 one from harbor freight tools. Kragen also sells a more expensive one for measuring brake and engine temps.
Good luck,
James
<a href=showthread.php?s=&postid=13524561#post13524561 target=_blank>Originally posted</a> by jamesdawson
T5s have a "coldspot" which is the end of the lamp where the manufacturer's writing is. What you need to do on a retro is have all the lamps oriented so the coldspots are at the same end and blow a fan across that end and it will hit all the coldspots. You want the temperature of the coldspot to as close to 113 fahrenheit as you can get it consistently. This keeps the rest of the bulb(s) at 95 fahrenheit which is the optimal temp for making PAR and bulb longevity.
Best way to measure the temp is with a non-contact thermometer, ie laser pyrometer. You can get one for like a $30 one from harbor freight tools. Kragen also sells a more expensive one for measuring brake and engine temps.
Good luck,
James
<a href=showthread.php?s=&postid=13519937#post13519937 target=_blank>Originally posted</a> by lilfish07
I have a 29gallon what T5 light are best to used for it any idea? should I go with 4x24w or 6x24w or the 2x65w
<a href=showthread.php?s=&postid=13525967#post13525967 target=_blank>Originally posted</a> by Mykel Obvious
What happens to the PAR if the bulbs are cooler than that? Which is worse, too hot or too cool (I would imaging too hot would degrade life faster) Wouldn't you need some sort of temp controller on the fan to cut it off if it drops the bulbs temp too much? Or would a variable speed fan be better, just turn it down till the bulbs read 113F at the cold-spot and hope the house temp doesn't change to much? Anything else I might need to keep in mind?
Just wondering as I might go with retro over ATI to save almost $500 (that's a skimmer upgrade right there) and want to figure out how to set them up to maximize PAR and bulb life
<a href=showthread.php?s=&postid=13527167#post13527167 target=_blank>Originally posted</a> by jamesdawson
Overcooling drops PAR also. It can take a while but usually you can get the desired temp to be stable. If you have a Profilux controller you can set it to vary the speed of a 1-10v fan in order to maintain a constant temp at the temp sensor. If you can afford a Profilux though, you might as well get an actively cooled T5 fixture like the PowerModul, Sfiligoi Stealth, or the les expensive and very effective Aquatinics Constellation or TX5 IMO.
James