Lamp

If a mercury discharge lamp then you will have a hard time finding a resistance. You have to check there is a standing voltage and a trigger pulse

-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on

On Sat, 25 Apr 2009 08:37:28 +0100, "N_Cook" put finger to keyboard and composed:

I suspect the OP is referring to something like the following.

LED Projection Lamp Lights for Architectural Lighting (QL-P2-W):

I believe a DMM would see the LED strings as open circuits.

- Franc Zabkar