LED vs normal lights - power consumption question.

[Colin 1985]

I understand the alternator in my BEC (hayabusa) produces 400W @ 5000rpm.

Since electrical power is at a premium, and I am wanting to install a more power draining electric water pump I was wondering if anyone knew how much power can be saved by using LED bulbs rather than standard ones (break lights, indicators), and are they a direct replacement?

Edited by Colin 1985 on Thursday 11th November 21:50

[Colin 1985]

Defcon5 said:

How many bulbs do you currently have and what wattage are they?

Not sure about wattage but I will check, I thought they might just be a standard wattage(I posted this as an after thought in another thread so haven't looked at the properly). There is just two break lights, two rear lights and the indicators. The fronts are HID so can't do anything with them.
One of the reasons I asked though is because at tick over with all the lights on and the fan running if I indicate the warning light on the digi dash blinks to say low voltage.

If the LED light have a resister in them wouldn't that mean they consume the same amount of power overall because the resistor 'waists' the saving between the LED lights and the standard ones? Or am I being stupid?

Edited by Colin 1985 on Thursday 11th November 22:32

[Colin 1985]

Thanks for your replys, in answer to some points:

The regulator is mounted on the passenger bulkhead, the wires were getting hot, but I reconnected them and think they are ok.

I'm not sure what rating the fan is. It only comes on when stationary though, when driving (when the cooling system is working as it should) the car tended to over cool slightly if anything. Haven't had it on a track day yet though.

Fuel pump hadn't occurred to me, if I fit the new water pump and do experience problems I will look into that.

With respect to starting, it is a 2003 motor, but the first idler gear has been replaced with a clutch which protects the starter from it kicking back (I think that was the problem?).