🚀 go-pugleaf

to run a halogen lamg:

1/ Use rated voltage or less

2/ Ac and Dc work equally well.

3/ Main difference between these and 115v bulbs is that Halogems have
   been optimized for low voltage (fat filament) and high current.

4/ "Halogen: is usually iodine or the like which has heavy molecules that will
   discourage the sputtering of the filament material away (sputtering
   depletes the filament and otherwise shortens its life).  Deterioration due
   to sputtering is evident by darkening of bulb interior.

5/ Quartz is usually used for the envelope because it expands very little when
   hot.  However, quartz is also very brittle hot or cold, so be careful.

6/ Spots (grease from your fingers) will etch onto the envelope when hot.
   This inceases the amount of heat absorbed by the envelope, leading to
   more deterioration.  So keep your sticky fingers off the envelope:

7/ Any transformer will work as long as it gives 12 volts (or whatever votage
   you need.  The transformer must be rated for the maximum current that
   you expect the lamp to draw.  The controls often supply 6vac ("low" ) and
   12vac ("high").   Thus, an ancient center-tapped filament transformer should
   be perfect for the job.  Precise voltage is not important (i.e. 11v vs 16v).
   Generally, the higher the voltage, the brighter the glow, but the shorter
   the life.

Ang.