Westinghouse 175watt Clear Lifeguard Mercury Vapor Light Bulb - 3
7:59
Sylvania 175watt DX BT28 Mercury Vapor Light Bulb
15:08
More vaguely-informative ramblings about low pressure sodium lamps
16:56
How To Make Ruby in a Microwave
6:44
Westinghouse 175watt Clear Lifeguard Mercury Vapor Light Bulb - 5
29:52
TEKTRONIX - Solder And Its Application In Electrical Assembly (1977) - VHS Transfer
34:02
Regent 70watt High Pressure Sodium Mini Area Light
12:03
THIS LAMP SOXs! "Yellow" tech of bright metal vapor lamp. Beats modern LEDs in brightness per watt?
14:48