My BL12-24 used to consume 24V 50W halogens bulbs at an alarming, and expensive, rate.
And there was nowhere local where I could obtain replacements, so bought a load from the supplier of the lathe.
Removing the reflector and filing two slots in the rim, with a 5/16" rat tile file, cured the problem. There were ventilation slots at the rear of the lamp, but none, or insufficient, at the front. The bulb merely needed more ventilation to reduce the temperature to an acceptable level. The front glass still gets hot, so there is a lot of radiant heat about.
Can't remember the last time that a lamp failed. (Now that IS asking for trouble!)
Howard