zebralight h604w 18650 xhp35 flood neutral white headlamp zebralight cree xhp35 neutral white led. nominal cct: 4500k, cri: 80+, tint deviation: 5-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 1400 lumens. operating voltage range: 2.7v - 6.0v battery: one 18650 size (up to 69mm) 3.6-4.35v li-ion rechargeable. batteries are not included in the package. parasitic drain: negligible (much less than the self discharging of a battery). beam type: 120 degree flood. dimensions - head diameter: 0.95 inch (24.2 mm), length: 3.85 inch (97.8 mm). weight: 1.4 oz (39 gram), 3.0 oz (84.6 gram) with zl635 battery, 4.4 oz (124.6 gram) with zl635 battery and headband. additional features - pid thermal regulated outputs (three highest output levels). builtin battery protections with continuously monitored temperature, current, and voltage, plus a (2.7v) low voltage cutoff. battery capacity indicator (led flashes 1-4 times, 4 short clicks to start). automatic stepping down from high to medium, and from medium to low when battery capacity is low. durable electronic soft-touch switch. sealed and potted led driver circuitry. tempered optical grade glass. battery reverse polarity protection. waterproof to ipx8 (2 meters, 30 minutes).