Overdriving 1 watt luxeons

[zzublogan]

I have 4 1 watt luxeons hooked up in parallel drawing average about 800 milli amps DD 3 1.5 v D battery, and 1 incandesent bulb i measure from another flashlight measuring 800 mA also 3D DD, which will last longer in terms of battery life?

 

[Deleted member 684]

The 1 watt LS will last longer, incandescents get more inefficient as the batteries drain they draw more current as the voltage drops because of less heat in the filament which results in less resistance which means they try and draw more current.

LEDs get more efficient, they draw less current as the voltage drops.