One standard 75 watt light bulb produces 1210 lumens, or units of light, therefore, two 75 watt light bulbs generate 2420 lumens. One 150 watt light bulb generates 2580 lumens, so, you get more light from one 150 watt than two 75 watt light bulbs. Why? The 150 watt filament gets hotter than the 75 watt filament [about 100 degrees F hotter]. The hotter filament the more light is produced.

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