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Recording power and lumens of a light bulb.?
Which is more efficient, or has the highest lm/W, a lower- or higher-power light bulb? To find out, look at bulbs and record the power and lumens.
Lumen, lm, = P or luminous flux.
Power of the light bulbs would be the number of watts, correct?
I am confused as to how to calculate the lumens of a light bulb. My teacher said that we can just look at bulb boxes at a store, so I know no measuring of surfaces is involved.
Thanks in advance.
Don't calculate the lumens. Look on the box the light buld comes in. It will list the lumens.
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