<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by roger:
The reflector on the Princeton Tec 40 doesn't work so well to focus the light into a spot. With the normal halogen bulb, the PT-40 has a really nice, tightly focused beam. The LS bulb gives turns this light into more of a diffuse, area light.<HR></BLOCKQUOTE>
Depending on which way the LS bulb is out of focus, you might try using spacer rings, like the kind that used to come with Magnum Star bulbs sold for the Mag Lite.
At least you should have a 50% chance of that working. If the light is out of focus because the business end of the bulb is too high up inside the reflector, the rings will work.
But not if it's too low in the reflector, as the rings will make it sit even lower.