Heat From Light Bulbs – the higher the watts, the hotter the bulb?

A compact fluorescent bulb gives off very little heat energy because they do not use resistance and cause a light to glow hot.

What do you need?

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1. A goose-neck style lamp.
2. An extension cord.
3. Different wattage of incandescent light bulbs – 25 watt, 40 watt, 60 watt, 75 watt, 100 watt, 150 watt.
4. Compact Fluorescent light bulbs – 7 watt, 23 watt – They are expensive; so shop around for ones that don’t cost so much.
5. Thermometer.
6. A ruler or yard stick to measure distance from the thermometer to the light bulb.
7. A white towel.
8. A watch or stop watch to measure the time.
9. A piece of paper and pencil to record your observations.

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