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"black tip" lamp


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#1 Rob van Gelder

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Posted 14 February 2007 - 01:53 AM

We recently got a Dedolight 400 lamp, which comes with a "Black Tip" HMI 400 watt lamp.
The black tip is to reduce internal reflections, however, we are unsure which side has to face the front lens.

Here are 2 pictures of both sides of the lamp, is there someone in the know out there?

There is no info in the Dedo website and also the manual is not clear about the position.

Attached Images

  • IMG_1046_1_1_1.JPG
  • IMG_1047_2_1_1.JPG

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#2 JD Hartman

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Posted 14 February 2007 - 09:40 AM

I don't own a Dedo, but I'd conclude that that the black should face the reflector. In this way, a "ghosted" image of the internal components will not be projected.
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#3 Luke Prendergast

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Posted 14 February 2007 - 04:54 PM

Haven't used Dedo's, but logic says - if the black side is toward the reflector, what is the reflector for? In my repair days I saw many assorted fixtures with a metal tab shielding the lamp on the lens side.
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#4 Sing Lo

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Posted 14 February 2007 - 05:15 PM

Haven't used Dedo's, but logic says - if the black side is toward the reflector, what is the reflector for? In my repair days I saw many assorted fixtures with a metal tab shielding the lamp on the lens side.



My 150W Dedolight tungsten lamp shielding has slightly different design. The black shield is built inside the globe holder on the aspheric lens side, instead of coming with the globe. So I would say your lamp black shield should face the lens.

Edited by Sing Lo, 14 February 2007 - 05:16 PM.

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