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What is the effect of lamp length or diameter on brightness?

April 26, 2017brightness diameter lamp LENGTH

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What is the effect of lamp length or diameter on brightness?

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Using the same drive current, the surface intensity of a smaller diameter lamp will be greater. Longer lamp lengths of the same diameter have greater total light output.

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A. Using the same drive current, the surface intensity of the smaller diameter lamp will be greater. Longer lamp lengths of the same diameter, however, have greater total light output.