Mares XR Back Up Light

On Order
The Mares XR Back Up Light is a compact, low weight, handheld light featuring 12500 Lux at 1 meter with a very tight 8° beam angle.

Due to severe supply chain issues, we are out of stock on this product until December. Use the "Notify me..." link above for an immediate email when we receive our order.

Mares XR Back Up Light

XR Back Up Light
On XR Rigid Cap XR Back Up Light Mares XR - How to set up the Back-up Light Dimensions
  • Twist-On activation, 850 raw Lumens, 12500 Lux at 1 meter
  • Approximate 2.25 hour burn time with single 18650 Li-ion battery
  • Approximate dimensions { 1.3 X 5.6 in | 34 X 142 mm}
  • Dry weight { 5 oz | 140 gm} including battery
  • IPX-8 waterproof to {330 ft | 100 m} depth

The Mares XR Back Up Light is a compact, low weight, handheld light featuring 12500 Lux at 1 meter with a very tight 8° beam angle suitable for technical diving applications. The light has an engineered thermoplastic body, aluminum head with twist-on activation and is IPX-8 rated waterproof to {330 ft | 100 m} depth. The LED outputs 850 raw lumens and measures 12500 Lux at 1 meter, with approximately 2.25 hour burn time on a single standard rechargeable 18650 Li-ion protected battery. The approximate dimensions are { 1.3 X 5.6 in | 34 X 142 mm} with a { 5 oz | 140 gm} dry weight including the battery.

In The Box: Package includes handheld light aluminum head and engineered thermoplastic body, 18650 battery and charger with USB cable, wrist lanyard, and spare gasket seal.

More Information
Brand Mares Extended Range
SKU XR-415789
Weight 0.750000

Lumens, Lux and Burn Time - Caveat Emptor

Various LED dive light suppliers use different methods of determining light output, plus expressing them in different forms of measurement. What matters is the visible light from the LED that bounces off the reflector and passes through the lens. The quality of the reflector and lens, as well as the actual amount of power delivered by the battery have a major affect on the amount of light that reaches the target. Dive lights would be better described by the system lumens (sometimes called out-the-front or OTF lumens), which is the amount of visible light emitted by the entire system of battery, bulb, reflector and lens. Describing any LED dive light in terms of the radiant lumens specification of the entire light output for a raw LED module (including IR and UV wavelengths we can't see) at maximum power under laboratory conditions can be very misleading.

In our opinion, using lux measured at the target distance (typically 1 or 2 meters), and not just initially but across the entire burn time, is the best way to describe the brightness of dive lights. The difference is that the lux takes into account the area over which the light beam is spread. The lux is the visible light measured at the target distance, not the bulb. A light of 1000 lumens, concentrated into an area of one square meter, is said to illuminate that square meter with an brightness of 1,000 lux. However, the same 1000 lumens, spread out over ten square meters, produces a much lower value of only 100 lux.

There is a test standard (ANSI/NEMA FL-1, approved in 2009) for measuring flashlight lumen output, burn time and impact resistance. Sadly, we are not aware of a single dive light manufacturer who has elected to rate their lights using the FL-1 standard. Until they do, we must rely upon our supplier internally published specifications for our descriptions, but we suggest you take all of them with a grain of salt. Like the fuel economy ratings on automobiles, your results for light output and burn times may vary considerably from the questionable values being published by the dive light manufacturers.