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Old 04/09/2007, 11:03 PM   #7
seandanekind
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Join Date: Feb 2002
Location: Columbus, Ohio
Posts: 1,302
Hey Al-

Awesome job on the article. It's nice to finally have some complete data tracking lamps from burn in to a solid year later...

You got me to dig and find my old thread from a year ago where I compared old Phoenix lamps to brand new ones and you mentined starting your study:
http://www.reefcentral.com/forums/sh...hreadid=787010

I'll measure mine this weekend since it's been another solid year, and I never did replace the other 2 bulbs (I'm getting ready for 400W Radiums), so they're over 6000 hours each. That might give you a little more data to play with. I didn't do any monthly readings, but hopefully I'll see something similar to your 6-9% difference in the extended use for my 2 older lamps.

I have visually compared the spectrum of newer lamps a few months back (over my frag tank) and the only spectral difference I can see with my eyes is the same difference I noticed in my thread from a year ago... where it looks like the actinic "pop" has faded (I assume that's the tiny little bump around 420nm fading away).

...and I still need to send those lamps to Sanjay...


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