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The Wattage of a bulb tell you how much power (energy per second) you put into it. The energy will come out mostly as heat but obviously also light.

The wavelength has the units of length and tells you what type and color of light it generates. The energy in each particle (photon) of light is dependent on the wavelength but the total power input isn't directly related. You can have both high and low input power infra red (long wavelength) and Ultraviolet (short wavelength) lamps.

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Q: Does wavelength determine the watts of a bulb?
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