How HID BULBS/LAMPS AND BALLASTS Work- Metal Halide, High Pressure Sodium, & Mercury Vapor
19:51
Heating and Bending PVC Conduit - BENDING 90s, OFFSETS, and BOX OFFSETS
37:40
Lamps & Bulbs Electricians Should Know - Incandescent, Fluorescent, HID, Halogen, LED
8:18
The Metal Halide Lamp (MH)
15:08
More vaguely-informative ramblings about low pressure sodium lamps
12:03
THIS LAMP SOXs! "Yellow" tech of bright metal vapor lamp. Beats modern LEDs in brightness per watt?
21:40
The LED's Challenge to High Pressure Sodium
25:03
how to wire ballast 1
5:20