BULB DISCUSSION BOARDS > Modern Electric Lighting

60W -> 250W Tungsten Overrun

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pSlawinski:
Here are some pictures of various incandescent lamps being overrun on a 250 W Metal Halide ballast.  The lamps look much better when they are overrun.  As with anything that is overrun the lamps do not last long, with the exception of the 60W halogen lamps which you can get well over an hour of runtime out of.


75W Philips Natural Light


Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/Compare.jpg


I overran a 60W Halogen as well.

Normal:


Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04511.jpg

Overrun:


Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04510.jpg

Normal:


Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04502.jpg

Overrun:


Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04506.jpg


Some pictures of fun things to do with these lamps after you’ve burnt them out.  (I ran them on a neon sign transformer 9 kV 25 mA)

Halogen Capsule:

Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04535.jpg

60W Philips Dura-Max:

Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04529.jpg

pSlawinski:
The halogen lamp I had been running for about two hours died as I was writing this topic.  Needless to say after being overrun at 250W for about two hours the capsule is pretty blackened.  Perhaps I will post some pictures of the lamp tommrow.

pSlawinski:
After running for about two hours the filament finally split.? After it died took a look at it and the quartz was red hot in the dark areas.? I think if it kept on running for another hour or so the quartz might have failed.

60W Philips Halogen?


Large Image:http://www.metal-halide.net/bulbcollectorforumpics/Large/DSC04579.jpg

mr_big:
You should try overrunnig a compact fluorescent bulb

pSlawinski:
That wouldn't work.  I would burn up the ballast very quickly.  The only way I could get more current into the tubes for a long enough time to take a picture would be to remove the tubes from the compact fluorescent ballast and put them on the metal halide ballast.  Even if I did that the lamp would fail very quickly, the electrodes just aren't made to handle that kind of current.

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