Can someone please help!!!

[CROVINE1]

I am having a heat problem in my 36 cassette, 38 bulb full HP stand up. I was using Phillips 250-500w, but customers were not happy. Switch to supra 400-500w and customers loved them, but I just metered them after approx 100 hours, 50% drop in power. What should I use for my hot box with 500w ballast. Need something that can take the heat and will keep my customers happy.

[navigatin1]

50% drop in "Power" or "Output"????

[CROVINE1]

Output on the 5.0 meter!

[CROVINE1]

was metering at the body 60, now 30

[John]

The Supra lamp is more of a 400W lamp. I would recommend using a Magic Sun 500W or the Philips 400W 30S with the gold ends. These lamps have a much larger diameter & will hold up better with the 500W ballast & the heat of that unit.

I would also check the voltage & see if it is low? Dropping 50% in UV output at around 100 hrs is no good.



Bad picture, but you can see the size difference in the lamps. Supra is the center lamp.

[Drew]

A "larger" bulb just reduces heat build up. If the bed is cooled like krap, then using a larger bulb would work. Hell, the 600wl Supra is bigger and will light just fine in a 500w application.

So many companies are running their HP beds 200 watts lower than the printed material on the beds say now anyway.

[engfant]

I never understand these questions. If the bed is running too hot then you need more cool air not stronger lamps! Spend $500 on an A/C unit and cool that hellish unit!!!

[John]

If the bed is running too hot then you need more cool air not stronger lamps!

Engfant, not much you can do with a poor designed unit. If the internal cooling is not adequate then it does help to use a larger lamp. The larger diameter lamp will shed the heat better & give a much longer more consistant output. However many times going to a larger lamp can also cause output to drop as compared to the standard lamp. So it's a trade off, you get either longer lamp life or better output for 200 hrs.

[CROVINE1]

not the heat, see new post