Question

Analyze: To gauge the efficiency of a light bulb, it is also important to consider how much light it produces. Light intensity is measured in lumens (lm). A lumen is equal to the light produced by a single candle. The lumens produced by each type of light are listed below. To compare the efficiency of each bulb, calculate how many lumens each bulb produces per watt. To do this, divide the number of lumens by the wattage for each lamp. Include all units. Lamp Lumens (lm) Wattage (W) Lumens per watt (lm/W) Incandescent 800 lm 60W 13.3 Im/W Halogen 6,000 lm 300W 20 Im/W Fluorescent 2,000 lm 30W 66.7 Im/W A. Which lamp produces light most efficiently

Answer 1

The Fluorescent lamp is most efficient

Step-by-step explanation:

66.7 lumens/watt

Fluorescent was always the most efficient vs. incandescent or halogen gas envelope

This question needs some updating as LED lamps now beat fluorescents in life expectancy and lumens/watt.