Halogen Bulb Blackens And Burns Out Too Quickly: a) Halogen bulbs have to be on long enough to reach their usual temperature in order for the chemicals in them to work properly. Do not use them for closet lights or refrigerator lights. ...
I recommend "tubular"/"refrigerator"/"showcase" "lamps" (lightbulb types) of 25 or 40 watts. These are better than most others for giving some sort of nice glow at really low voltage since they have a vacuum rather than a gas fill. ...