Amanda goes shopping for light bulbs. in the light bulb aisle, she finds the following incandescent light bulbs. can you her determine which light bulb is the least efficient? wattage lumen output 25 w 210 40 w 445 75 w 1180

The least efficient light bulb is the first one (25 W - 210 Lumen)

Explanation:

Efficiency can be defined as what you want to obtain over what you need to produce it. In this case Eff= Wattage / Lumen. For each light bulb, their efficiency is: 8.4 / 11.12 / 15.7 Lum/W

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