if it was ok before you fitted the new light's then it must have somthing to do with them or the wiring you altered may be shorting out & draining the battery,ide try fitting the old light's & return the wiring to how it was before & then see if problem goes away,you can allway's refit them again after,you could just remove the fuses for the lights but it depends which circuit is faulty & may not help as you have different fuses for h/lamp,side lights etc,failing that check that nothing is staying on like the radio-interior light-glove box light-boot light etc.