The led bulb is the most recent development in residential lighting.  These bulbs.  Although currently more expensive upfront, they last significantly longer, are more durable than their counterparts, and represent a significant savings across their lifetime.  According to the US Department of Energy, widespread adoption of LED's has the best possibility to reduce energy use in the US. 

 

Advantages:

• Most efficient of all options, the bulbs use 25% or less electricity than incandescent

• Last 25 times longer than incandescent, best choice for hard to reach areas

• Represent the greatest opportunity for savings across their lifespan

• They produce very little heat

• Highly durable

• Non-toxic

 

Disadvantages:

• Relatively expensive upfront cost compared to CFLs or incandescent

• Bulbs are not dimmable unless clearly stated

• Light from LED's is one directional which may not be suitable for all applications