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   一家4兄弟
 
 
   和上一代的外观完全一样
 
 
 
   头部的灯珠明显大一的多,而且灯珠是突起的,这样光斑的外圈就不是很圆,怪不得以前都是磨砂玻璃版本。
 
 官方介绍
 
 Cree XHP50.2 Neutral White LED
 Nominal CCT: 4500KCRI: 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  2300 Lm (PID, approx. 1.8 hours)   or  H2 1311 Lm (PID, approx. 2 hours)/705 Lm (PID, approx. 2.5 hours)/358 Lm (5.1 hours)Medium:  M1  171 Lm (12.1 hours)   or   M2 77 Lm (26 hours)/33 Lm (2.5 days)/13 Lm (6 days)Low:         L1  5.0 Lm (13.5 days)  or  L2 1.8 Lm (1 month)/0.6 Lm (2 months)/0.2 Lm (3.5 months)Beacon Strobe Mode: 0.2Hz Beacon at Low / 0.2Hz Beacon at H1 / 4Hz Strobe at H1 / 19Hz Strobe at H1
Operating Voltage Range: 2.7V - 6.0VBattery: One 18650 size (i.e. unprotected, 65.0-65.2 mm long) 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
 80 degree spill14 degree hot spot
Dimensions
 Head Diameter: 1.2 inch (30 mm)Body Diameter: 0.98 inch (25 mm)Length: 3.8 inch (96 mm)
Weight
 2.26 oz (64 gram) without battery
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 cutoffBattery 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 switchSmart user interface provides fast and easy access to all brightness levels and beacon-strobes.Precision machined unibody casing from premium grade  aluminum bar stocksProprietary heat sinking design bonds the LED board directly to the unibody aluminum casingDurable natural hard anodized finish (Type III Class I)Sealed and potted LED driver circuitryTempered optical grade glassOrange peel textured reflectorBattery reverse polarity protectionPocket clipLanyard ringWaterproof to IPX8 (2 meters, 30 minutes)
 
 
 
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