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The projecteur extérieur led meet the professional cycling certainly can meet the daily ride, so here only shows the professional cycling. In fact, here is the so-called professional cycling speed and riding time, the professional cycling riding should be able to maintain the 30km / h speed, equivalent to 8.4m / s, this rate should chose flashlight can illuminate 30-50 meters, battery life can guarantee 2-3 hours. 1. Flashlight Type: because it is riding, so first of all, to be better fixed; secondly, not be too long, too long will affect the riding; again, to be convenient to spot exterieur adjust the angle; fourth, to be able dimming, because urban areas do not need too bright (Special note, the urban street riding need headlights, because the cars in the street cannot clearly see the side road rider, especially there are trees, shrubs and other plants shadows, then turn on the lights is not to light the way, but to allow the driver to see you); fifth, need for MyLED coupon adequate long life; sixth, must be durable and not bruise rider. Given these conditions, it is recommended to choose a professional cycling lights, ordinary flashlight cannot meet these many needs. The brightness required to achieve: riding light must have sufficient brightness to ensure the rider to see in front of 30-50 meters, beam angle not too narrow, because too narrow will not see the vehicle in front near the road, it is recommended to select MyLED discount CREE XPG R5 or CREE T6 light source products. 3. bombillas g9 led color: recommend choose color temperature 4000-5000K products.4. Battery: pursuit of highlighting, and require long battery life, it is recommended to select 26650 rechargeable battery products, if more than two hours riding time, a multiple spare battery is good choice. 5. Dimming: high, medium, low, strobe, SOS, strobe is useful in urban areas, so that drivers can see you very far. Riding is a professional sport, you need to choose professional lighting. Taking these two aspects requirements, LED underwater lights dustproof is grade 6, waterproof rating is 8, which marked symbol: IP68.3, security featuresIn the landscape place, personal safety should be the first element when choose LED underwater lights. myledgrowupanty 150204