Best Metal Halide Bulb
Best Metal Halide Bulb
(OP)
I am managing the relamp program for some 400 hazardous EX fixtures using 250 watt metal halide bulbs. These are the original type, not the pulse start of the newer technology.
I've tried GE, Sylvania, Phillips, Ushio, Venture - they all dissappointed. Bulbs are on all year, and we relamp every year. We are seeing a lot of bulb falling within this time, about 30%.
I used to be able to get long life metal halides from a company called Wholesalelighting, but they appear to be out of business.
Who do you think is making the best MH bulb right now?
I've tried GE, Sylvania, Phillips, Ushio, Venture - they all dissappointed. Bulbs are on all year, and we relamp every year. We are seeing a lot of bulb falling within this time, about 30%.
I used to be able to get long life metal halides from a company called Wholesalelighting, but they appear to be out of business.
Who do you think is making the best MH bulb right now?





RE: Best Metal Halide Bulb
To answer your question, I've always had the perception that GE, Sylvania, and Philips manufactured the best lamps. The only other manufacturer that I know of that you haven't already mentioned is EYE Lighting. I believe they offer "long life" metal halide lamps, but given your experience with other manufacturers so far, I wouldn't expect theirs to be much different.
RE: Best Metal Halide Bulb
If you assume a normal distribution, and assume a cumulated failure total of 30% at 1 yr, you'd get a variance of 2354 hrs, which might be plausible.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: Best Metal Halide Bulb
The bulbs I have tried all met, but need not exceed, their published curves.
My question is if their are any probe start metal halide bulbs that exceed the performance of the standard curve (10K hours for a 250MH).
There is a company on the web called bulbarama that is claiming 24K hours. Any try these.
http://w
I talked with the EYE rep and they claimed a special doping solution that lasts longer and that their bulbs exceed the curve even though they are using the same 10K hour curve for their probe start. They say they are being 'conservative'.
Has anyone tried the bulbarama or EYE bulbs to report back if they performed any better.
RE: Best Metal Halide Bulb
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Best Metal Halide Bulb
This is probably a more reliable way of cranking up the life, since the mechanism is not proprietary. The only big impact is that the color temperature will be lower and redder.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: Best Metal Halide Bulb
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Best Metal Halide Bulb
Downsides, of course, include their cost and susceptibility to failure in a high ambient temperature environment.
RE: Best Metal Halide Bulb
RE: Best Metal Halide Bulb