Strictly T5 thread

[digital-audiophile]

Originally Posted by Aquattro

Greg, you KNOW what you need....don't fight it.

I fight the brave fight

Originally Posted by Treebeard

I have been meaning to ask this question for sometime now, and this thread is the ideal place to ask.

From what I have read, T5 bulbs should be replaced approximately every 12 months. Why?? Is this based on quantitative measurements, or is it because Joe's Fish Store needs to sell you new bulbs once a year for his kids college fund?

On the zeo system KZ actually recommends that you replace your bulbs every 6 months I really think this is overkill.

A year seems to be ok but they do really lose a great amount of par.. I need to find the post by ihavecrabs, he did some par readings on his old T5's just before he changed them and then the new readings, it was really a big difference.

[Treebeard]

That is enough proof for me.

Originally Posted by digital-audiophile

A year seems to be ok but they do really lose a great amount of par.. I need to find the post by ihavecrabs, he did some par readings on his old T5's just before he changed them and then the new readings, it was really a big difference.

[digital-audiophile]

I found the thread

http://canreef.com/vbulletin/showthr...&highlight=par

a big loss in par over 10 months.

[Canadian]

Keep in mind that PAR drop reported by ihavecrabs is with a fixture that isn't actively cooled. Of course you're going to burn the schnikeys out of the lamps without active cooling (in addition to getting lower PAR values). You're better off going with a higher quality fixture than a TEK because in the long run your lamp replacement costs will outweigh the up-front difference in the cost of the fixture. Comparing a TEK fixture to something like an ATI, Sfilligoi, Fauna Marin, etc. is like comparing a Seaclone to BK. I'm sure there is obviously some PAR drop in the better fixtures but I doubt it's as rapid as the uncooled TEK and comparable fixtures. This is one of those cases (similar to skimmers) where you really get what you pay for.

I'm going to have to get a PAR meter so I can monitor the PAR changes in an actively cooled fixture.

Originally Posted by digital-audiophile

I found the thread

http://canreef.com/vbulletin/showthr...&highlight=par

a big loss in par over 10 months.

[lorenz0]

Originally Posted by Canadian

Keep in mind that PAR drop reported by ihavecrabs is with a fixture that isn't actively cooled. Of course you're going to burn the schnikeys out of the lamps without active cooling (in addition to getting lower PAR values). You're better off going with a higher quality fixture than a TEK because in the long run your lamp replacement costs will outweigh the up-front difference in the cost of the fixture. Comparing a TEK fixture to something like an ATI, Sfilligoi, Fauna Marin, etc. is like comparing a Seaclone to BK. I'm sure there is obviously some PAR drop in the better fixtures but I doubt it's as rapid as the uncooled TEK and comparable fixtures. This is one of those cases (similar to skimmers) where you really get what you pay for.

I'm going to have to get a PAR meter so I can monitor the PAR changes in an actively cooled fixture.

Thats a very good point which is why i have been debating swapping out my TEK for a powermodual down the road, also the 8 bulb power modual is close to the same size as the 6 bulb TEK light. But yes active cooling plays a big part when it comes to the life span of the bulbs but for most people the TEK is not that bad of a fixture.

[digital-audiophile]

Cool, before I go and spend the extra bucks on a ferrari T5 fixture it would be nice to see the par drop in a XXXX time span as compared to the TEK's.

[lorenz0]

you can get a similar effect by running a fan across the bulbs on a TEK