When it comes to "traditional, old school" lights, SureFire has been setting the pace for years. The L7 Digital Lumamax is manufactured from Mil-Spec Type III hard-anodized aluminum with an LED bulb. The light runs on a B90 rechargeable battery. Two batteries and a charger are included in the kit. The LED lamp window is tempered Pyrex, so it will survive the hottest of temperatures. The L7 runs for about two hours. SureFire claims two and a half hours. Of course, temperature and climate will affect the runtime. The battery will recharge to full power in approximately 20 minutes.