Do 12volt 50watt Halogen lamps use 50watts of power?

Question

It may sound a dumb question but say if you had 4 50watt 12volt halogen lamps on a fitting would that consume the same amount of power as 4 50 watt 240volt lamps - I am just asking because the Halogen ones are 12volt low voltage (i.e. transformer drops from 240v to 12volt)

Answer 1

12 volts

Answer 2

No, 50 Watts at 240Vs would create a draw of 0.20833A or 208mA

50 Watts at 12V would create a much larger draw closer to about 4A, you also haven't considered the parasitic loss from the inductance from the transformer and the heat created.

Answer 3

The watt (symbol: W) is the SI derived unit of power, equal to one joule of energy per second. It measures a rate of energy use or production

Answer 4

W=IxV where W = Watts, I = Current & V= Voltage, therefore the higher the voltage the less current will be drawn, 12V is 20times less than 240V so the current drawn will be 20 times greater (Theoretically).

Answer 5

are we talkin transformers rectifiers ac or dc................