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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.

The table is as follows:

                                                                                                                                       

| Lamp             |    Lumens (lm)    |    Wattage (W)    |    Lumens per watt (lm/W)*   |

| Incandescent |         800 lm          |          60 W          |              13.33... lm/W              |

| Halogen         |        6,000 lm        |         300 W         |                 20 lm/W                   |

| Fluorescent    |        2,000 lm       |           30 W          |              66.66... lm/W             |

 

A. Which lamp produces light most efficiently?

B. Which lamp is the least efficient?

 

**The thing about this is I get answers I'm not sure are correct. I don't know if I carried the problem out the right way or if I misread

*The "unsure" answers that I got

 Nov 29, 2016
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To get lumens per watt  (l/w)  just divide the lumens by the watts 

You have the correct answers......the most efficient one will be the one with the highest l/w number (66.66 l/w)

Least efficient is smalles l/w ( 13.33 l/w)

 Nov 29, 2016

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