Hello guys, thanks in advance for your time & help. Situation is:

I have a 150W ceramic heat emitter that screws into a ceramic light bulb fixture. This means that it requires 120V, alternating current (AC), and 1.25 Amps (W = V x A).

Can I power this heat emitter from a switching power supply that provides a maximum of 20 Amps on 12V (240W) in direct current (DC)?

Basically, the wattage is supported, but the voltage and amperage are all different...  I've read that AC or DC should not matter for incandescent light bulbs. Can I assume the same for this heat emitter?

Thanks again!

Quote:


How did you arrive at 120V? Is it an american product or ?

If it's a UK product I would expect it to be designed for 230V and therefore draw around 650mA. (230V x 0.65A = 150W)

Quote:


Possibly.

If the heater is a UK model needing 230V at 650mA then you need a mains inverter to convert 12V to 230V.  Maplin sell a 300W inverter which would do that...

http://www.maplin.co.uk/Module.aspx?ModuleNo=48723&C=SO&U=strat15

If the heater needs 120V then you need to find a 12 to 120V inverter. No idea where you get one of those but I haven't looked.