This depends on the bulb design. A simple tungsten filament bulb might have a surface temperature of the bulb well above 100 C. A fluorescent lamp will be much cooler for the same light output.
200 degrees
It's a halogen bulb
If the two bulbs use the same technology the 100 w bulb is 10/6 times brighter than the 60 w. Incandescent bulbs give about 10-12 lumens per watt Halgogen gives about 15-18 lumens per watt CFL (low-energy) gives about 50 lumens per watt.
Yes.
1 watt = 1 Joule/sec 60 watts x 900 sec = 54 000 Joule 100 watts x 500 sec = 50 000 Joule So you use less electrical energy using 100 watt light bulb for 500 seconds.
Incandescent bulbs give about 10 lumens of light per watt of electric power Halogens give about 13 lumens per watt CFLs give about 50 lumens per watt So it depends on the type of bulb.
A 50 watt bulb designed to run on 12 volts takes 4.17 amps. A 50 watt bulb designed to run on 230 volts takes 0.217 amps.
A 75 bulb will use more electricity.
No, it will not be. You will need at least a 50 watt halogen for outdoor lighting.
Yes. It just won't be as bright.
Yes
Incandescent: 10-12 lumens per watt CFL: 50 lumens per watt.
It's a halogen bulb
If the two bulbs use the same technology the 100 w bulb is 10/6 times brighter than the 60 w. Incandescent bulbs give about 10-12 lumens per watt Halgogen gives about 15-18 lumens per watt CFL (low-energy) gives about 50 lumens per watt.
Yes.
1 watt = 1 Joule/sec 60 watts x 900 sec = 54 000 Joule 100 watts x 500 sec = 50 000 Joule So you use less electrical energy using 100 watt light bulb for 500 seconds.
40 watts. I did an experiment on this. Go do one and see for yourself. Sheesh. -_-
With lights the power is added up, so four 50 w lamps produce the same as one 200 w.