S slr32 Active Member Oct 29, 2008 #1 I found a good deal on metal halides but unfortunatly they are BU Base Up and not universal...Does this mean that burn with the bulb pointing up?
I found a good deal on metal halides but unfortunatly they are BU Base Up and not universal...Does this mean that burn with the bulb pointing up?
TheFaux New Member Oct 31, 2008 #2 The metal threads at the base of the lamp (where the weld is) need to be over/above the filament for it to operate properly.
The metal threads at the base of the lamp (where the weld is) need to be over/above the filament for it to operate properly.
