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 Several auto manufactures use HID driving lights. Of course they are
enclosed in slightly larger housings than say a test tube design and some
are not pressure tight, so heat build up is not an issue. 
Nite Rider manufactures HID bicycle lights (and soon HID dive lights) that
use the 10W W/A HID bulb ballast. 
It may be that some manufactuers of the higher wattage HID's don't wish the
light to be used out of the water as it may compromise the o-ring seals.

So to answer you question, I'd say yes at least some designs can and are
used for extended periods out of the water.

Regards JD



At 05:18 PM 05/23/2001 +0300, Manos Manoli wrote:
>Some manufacturers claim that you can use your HID lights for up to 9
>hours outside the water ( thats if you got the power ) , others say that
>
>although they produce much less heat than the halogen , they should  be
>on  underwater.
>
>If it is tue that they can work on land is there any handheld flashlight
>style,
>HID in the market ?
>
>What's the truth ?
>
>Manos.
>
>
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>


"SILT HAPPENS"JD   JEFF DISLER
  SAFE CAVING       NSS 26000
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