zebralight h53fw aa headlamp floody neutral white zebralight cree xp-l2 easywhite led: nominal cct 4500k, minimum cri- 80, tint deviation: 3-step. user selectable levels: 3 main levels (high, medium and low). each main level can be programmed to one of its two sub-levels. the second sub-level of the each main levels can be further programmed to different brightness levels. light output (runtimes) - high: h1 320 lm (0.9 hr) or h2 267 lm (1.6 hr) / 192 lm (2.3 hrs) / 119 lm (4.2 hrs), medium: m1 63 lm (8.5 hrs) or m2 29 lm (21 hrs) / 12 lm (41 hrs) / 4 lm (4.5 days), low: l1 1.2 lm (13 days) or l2 0.3 lm (1.1 month) / 0.06 lm (2.2 months) / 0.01 lm (3.3 months), beacon strobe mode: 0.2hz beacon at low / 0.2hz beacon at h1 / 4hz strobe at h1 / 19hz strobe at h1. light output are ansi out the front (otf) values. runtimes tested (and parasitic drain estimated) using panasonic eneloop pro aa batteries. remaining battery power, about 10-20%, after step-down are not counted towards the runtimes. operating voltage range: 0.7v - 2.0v. battery: one aa size nimh, lithium or alkaline battery. panasonic eneloop or eneloop pro is highly recommended. batteries are not included in the box. parasitic drain: negligible (much less than the self discharging of a battery). beam type: floody beam from frosted lens, with 90 degree beam spread. dimensions - head diameter: 0.86 inch (21.8 mm), length: 2.9 inch (75 mm), weight 1.1 oz (31 gram), 2.0 oz (56 gram) with an eneloop aa battery, 2.8 oz (79 gram) with an eneloop aa battery and headband. features: battery capacity indicator (led flashes 1-4 times, 4 short clicks to start); all levels are current regulated; durable electronic soft-touch switch; durable natural hard anodized finish (type iii class i); sealed and potted led driver circuitry; battery reverse polarity protection; tempered optical grade glass; orange peel reflector; battery power can be disconnected by slightly unscrewing the tailcap to prevent unwanted activations or parasitic drain.