TG10 & TG15 The TrailGuide uses the same bulbs as the S10 and S15. The bulbs are interchangeable, and the optional 5 watt will deliver up to 6.2 hours of run time. The waterproof power switch is on the light and is easy to reach, even with gloves on.   NO STIFF NECKS HERE The light can be adjusted up and down over a range of 120 degrees plus 10 degrees side to side, so you can get the beam exactly where you want it.   CNC-MACHINED The entire light is CNC- machined and weighs only 3.5 ounces.   SIMPLE NO-BOUNCE MOUNTING SYSTEM A Velcro® strap feeds through the vent holes. When it's pulled tight to compress the Poron® rubber pads, there's no chance of the light bouncing around. A special strap holds the wire in place at the rear of the helmet.   LEAD-ACID, NI-CAD or NI-MH BATTERIES Three battery types offer real choices in run-time, weight, and price. LINK below for details on specifications and prices.   HELMET LIGHT ALONE? If you plan to start night riding with just one light, our recommendation would be that you choose a handlebar light, NOT a helmet light. Why? Because a helmet light by itself can confuse depth perception and mask obstacles, it can get you into trouble, especially on tricky single-track. If you're only going to have one light, it's way better to start with a bar light.

Link to PRICES & SPECIFICATIONS below. LEAD-ACID, Ni-CAD, or NICKEL METAL HYDRIDE BATTERIES These TurboDrive batteries are designed to be carried in a fanny pack or Camelbak®. The tiny nickel metal hydride battery weighs just 12 ounces.   BIKE MOUNT or HELMET MOUNT? Helmet lights allow you to see into corners, anticipate climbs, look down drop-offs, blind your riding buddies, and see some amazing animals. But their shadowless, flat perspective can confuse your depth perception and make obstacles hard to see. Bike lights create the shadows that allow you to see details clearly, but their light goes only where your handlebars are pointed. Singletrack is way more "rideable" and fun when you have both bike and helmet lights. See our DualSource info. TGHB - TRAILGUIDE HEADBAND For nighttime activities that don't require a helmet - crosscountry skiing, jogging, hiking, skating, snowshoeing, mushing, camping-whatever! The TGHB adjusts to fit everyone, is comfortable to wear, and holds the TrailGuide firmly in place.