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Federal DOE Legislation
The Department of Energy (DOE) issued new energy efficiency standards for fluorescent and incandescent bulbs. In 2007 the Energy Independence and Security Act (EISA) was signed into law. It is intended to reduce energy usage and greenhouse gas emissions, and established new energy efficiency standards for buildings, vehicles, and products—including light bulbs.This Federal legislation requires manufacturers to produce certain reflector bulbs and other household light bulbs that meet or exceed the new energy efficiency standards as stated in EISA.
The new standards are based on efficacy, and bulbs must meet new minimum Lumen perWatt (LPW) requirements.

More lumens equals more light
Lumens perWatt (LPW) is an expression of how many lumens we get from a light bulb compared to how much energy (wattage) we put in. The light bulb that produces the greatest number of lumens per one watt of energy is the most efficient bulb (similar to a car that can travel the furthest distance on a single gallon of gas is the most fuel efficient car).

LED Vs. Traditional Light Comparison Chart
Source: http://www.designrecycleinc.com/led%20comp%20chart.html
 
  

  

  
Light Emitting Diodes (LEDs) Incandescent Light Bulbs Compact Fluorescents (CFLs)
Energy Efficiency & Energy Costs
Life Span (average)  50,000 hours  1,200 hours 8,000 hours
Watts of electricity used (equivalent to 60 watt bulb).   6 - 8 watts 60 watts 13-15 watts
LEDs use less power (watts) per unit of light generated (lumens).  LEDs help reduce greenhouse gas emissions from power plants and lower electric bills
Kilo-watts of Electricity used    329 KWh/yr. 3285 KWh/yr. 767 KWh/yr.
(30 Incandescent Bulbs per year equivalent) 
Annual Operating Cost    $32.85/year $328.59/year $76.65/year
(30 Incandescent Bulbs per year equivalent) 
Environmental Impact
Contains the TOXIC Mercury  No No Yes - Mercury is very toxic to your health and the environment 
RoHS Compliant Yes Yes No - contains 1mg-5mg of Mercury and is a major risk to the environment 
Carbon Dioxide Emissions (30 bulbs per year)  451 pounds/year 4500 pounds/year 1051 pounds/year
Lower energy consumption decreases: CO2 emissions, sulfur oxide, and high-level nuclear waste. 
Important Facts
Sensitivity to low temperatures None Some Yes - may not work under negative 10 degrees Fahrenheit or over 120 degrees Fahrenheit
Sensitive to humidity No Some Yes
On/off Cycling     No Effect Some Yes  - can reduce lifespan drastically
Switching a CFL on/off quickly, in a closet for instance, may decrease the lifespan of the bulb.
Turns on instantly Yes Yes No - takes time to warm up
Durability Very Durable - LEDs can handle jarring and bumping Not Very Durable - glass or filament can break easily Not Very Durable - glass can break easily
Heat Emitted 3.4 btu's/hour 85 btu's/hour 30 btu's/hour
Failure Modes  Not typical Some Yes - may catch on fire, smoke, or omit an odor
Light Output
Lumens Watts Watts Watts
450 5-Apr 40 13-Sep
800 8-Jun 60 13-15
1,100 13-Sep 75 18-25
1,600 16-20 100 23-30
2,600 25-28 150 30-55

 

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