Re: Do different watt light bulbs produce different amounts of heat?

The question is "Do different watt light bulbs produce different amounts of 
heat?"
Yes.  In fact, most of the energy that goes into incandescent light bulbs 
results in heat.  Very little of the energy ends up as light.  A typical 
incandescent light bulb outputs only about 15% of its rated wattage as light.  
For instance, if the light bulb is a 100W bulb it will provide about 15W of 
light energy, and most of the other 85W is heat!!
It is very much less inefficient for a fluorescent bulb.  That is why a 15W 
fluorescent bulb is roughly about as bright as a 100W incandescent bulb.  More 
of the 15W goes into light in the fluorescent bulb.
- - John Link
   MadSci Physicist