I have a KenRad UDL-35 Divelight:
It is a 35W metal halide HID driven by NiMh batteries and complies with everything you want except replaceable batteries.
It has three levels with runtimes ranging from 55 to 75 minutes chosen by a rotary magnetic switch, a multi-LED battery indicator, discharge and overcharge protection, multi-voltage and intl. charger, flood and spot reflector, hot re-strike, isn't too heavy and is ... bright.
bernie