Understanding the differences between the types of lighting
Incandescent, Halogen, Fluorescent, LED – Which is best? Wattage is not the proper indicator for the amount of light a lamp produces. Refer to lumens for that reference.
Also critical for lamping decisions is color temperature. Refer to the following chart for help in deciding which lamp to buy.Lumens
Typical ProductEfficiacy (lumens/watt)Est. Annual Energy Use*Est. Annual Electricity Cost*125 3 watt CFL415 kWh$0.60150 3.5 watt LED436 kWh$0.70185 15 watt krypton1227 kWh$2.93210 25 watt incandescent846 kWh$5.01 ambient lighting400 9 watt CFL4416 kWh$1.80450 8 watt LED5615 kWh$1.60460 40 watt incandescent1273 kWh$8.02500 10 watt CFL5018 kWh$2.00 general room lighting800 12.5 watt LED6423 kWh$2.51890 60 watt incandescent15109 kWh$12.03900 15 CFL6027 kWh$2.931,000 12.5 watt LED downlight8023 kWh$2.511,180 75 watt incandescent16133 kWh$15.041,200 20 watt CFL6035 kWh$4.01 suitable for reading1,750 100 watt incandescent17182 kWh$20.061,750 29 watt CFL6053 kWh$5.82
How does halogen enter into this mix? As a point of reference, a 60 watt halogen lamp produces as much light as a regular 100 watt incandescent lamp.
* Estimated annual energy use based on 5 hours per day. Estimated annual energy cost based on electric rate of $0.1099/kWh (Jan 2011 US national average)
This table provided by EFI.