LED lighting, can it provide better MPG?

Any auto / electronics experts out there...

Does replacing all of a vehicle's lamps with LED's (light emitting diodes) provide a measurable effect in raising MPG?

Also, do HID (High Intensity Discharge) headlamps place a greater load on the alternator that standard halogen headlamps, thus lowering MPG?

Thanks for any input

[yicai12]

LED Lighting can offer a brighter light for drivers at night. So the driver can speed up and keep safe. If you want know more knowledge of LED lighting, please click here http://www.highbaylightchina.com/

[CarMad]

Reading this, I can clearly see that LED lights won't make any noticible difference to the MPG, but will it make any difference to the time running on electric mode in a Hybrid?

[CarMad]

Just to add to this, I know a lot of Hybrids and EVs have more in car technology, because the bigger battery helps run this. So surely switching to more efficient lighting will save on battery life?