Striker n blits are good lamps but I've had nothing but trouble with the variable striker.
Them handheld ones are ok plr500 beam is narrow not so good for running dogs unless your on big flat ground. Dl100 is an ok lamp but mine burnt out so in the end I decided to get a decent battery and striker. Happy with it when it works ok just not so pleased with the wiring. Best of luck whatever you choose ??