Hidden Hazards of Halogen Lamps
9:27
Ingenious hybrid lamp sold in a MINDLESS way...
11:56
Crazy difference between 5W LASER and 5W LED!
9:03
Handheld DNA eraser?!?
9:22
Weird battery change in Geiger counter
9:30
Desert Sun Lamps! | My least healthy lights yet?
34:12
Pourquoi Il Était Presque Impossible De Créer La LED Bleue
31:46
Why do hurricane lanterns look like that?
14:59