The Princeton Tec L.E.D. Island Pack includes the Miniwave L.E.D. which is a High Intensity White L.E.D. light that travels farther underwater for maximum visibility and truer colors.300 TIMES Longer Bulb Life - 10,000+ Hours! Equipped with a shock and Impact Resistant L.E.D. Bulb and a power saving switch allows for high or low lamp setting. Also included in the Island Pack is an Impact XL L.E.D. which is a 1 Watt L.E.D. bulb. It has a Twist actuator (Twist-on bezel) prevents accidental powering on/off. This light has a battery life of 50+ hours. Last but not least the Pack includes a Eco Flare. The Eco Flare is a vital part of any night divers gear list. It can be used as a tank marker on continuous burn or as a single ultra bright red marker for boats, ascent lines and emergencies.