LED Lighting Project Help Needed..!

[harvey66]

have bought several remote control "LED lights" for down the stables. They have 10 superbright LEDS in the light which run off 3 x 1.2v AA NiMh batts. I cannot find a data sheet so don't know what current they draw

http://www.amazon.co.uk/Solar-Mate-P.../dp/B001Q3YIXK

I have a main 100w solar panel & regulator which charges a 12v leisure battery for other things such as my electric fence

I want to remove the batteries/solar panels from the lamps and wire them into the 12v circuit direct from my main solar/batt regulator - but this is 12v and the LED lamps are running off 3.6v as far as I can see

Can anyone advise me what I would need to do to make this possible. I have been advised to use a 7805 regulator (and 1 capacitor on input and output) in each lamp to drop the circuit voltage to about 5v but would it really be that simple.....?

Thanks for any help