Light Bulbs | LED vs. Incandescent
33:33
Longer-lasting light bulbs: it was complicated
23:21
In Defense of the CFL: A Retrospective
11:40
Balafire: when a light bulb goes wild
14:26
Mystery RADIOACTIVE Source | Can we identify it?
19:06
How LED Works - Unravel the Mysteries of How LEDs Work!
24:51
LED Christmas lights which don't hurt the eyes: it finally happened!
11:46
Firing the Lorentz Plasma Cannon
4:20