So, just how much better are the new generation of LEDs compared with the ancient incandescents and even CFLs? Well, consider this:
Incandescent: 75 Watt
Cost: appx. $1.50 (range from around $0.50 - $2.00)
Lifespan: 750 hours (varies)
Avg. Annual Cost (assumes around 3 hours/day at about 11¢/KWh): $9.00
CFL: 75 Watt equivalent (18 Watt)
Cost: appx. $2.50 (range from $1.00 - $4.00)
Lifespan: 10,000 hrs (varies)
Avg. Annual Cost (11¢/KWh): $2.20

LED: 75 Watt equivalent (15 Watt)
Cost: $20.00 (varies)
Lifespan: 25,000 hours / 22 years (varies)
Avg. Annual Cost (11¢/KWh): $1.80