Its not the light, the AME heaters are voltage sensitive and as soon as the battery voltage goes below 12.8 volts they shut them selves off to keep the
Battery from going dead if you leave them on, so with a 65 watt stator and the heaters and light on you will draw the voltage down far enough to turn the heaters off! My berg has a 230 watt stator and when the heaters on # 6 sometimes they draw down far enough to shut off! But then again #6 will burn you!I belive the heaters at #6 they are like 40W so if even the wiring is to small the the voltage drops,,,, then heaters will shut off, ask me how I know?I took mine directly off the battery through a relay! Main switch on, relay energizes heaters on! That way I dont draw from the FI circuit.if you cut the switch off the heaters.you will get full heat like normal heaters on high, you can just turn them off and on.or ditch the light and run a solstice and you will never use another light again.