How did you determine the temperature?  Do you have a formula?

-----Original Message-----
From: Jinx [mailto:joecolquitt@CLEAR.NET.NZ]
Sent: Wednesday, July 11, 2001 2:47 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Bulb Life


> Assuming 120vac mains, 60w bulb, gives 0.5amp,
> so you need about a 12 ohm resistor, which drops
> about 6v. It will dissipate 3w, so use a 10w
> resistor, which will still get hot.

A 47R 10W (240VAC/60W bulb) reaches 63degC

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