Running in the dark? - Headlamp recommendations

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As my weight management and fitness efforts have evolved over the last year I find myself running more. This has gone from the gym treadmill, to now outside. Next April I will spend 2 weeks working in a very remote area, out of a tent, packed in water, no electricity for many miles. My work responsibilities will consume all daylight hours, but I plan to go run in the mornings before sunup. If anyone runs with a headlamp I would like to hear what equipment works for you.