• The DGX 300 Mini Light features a true out-the-front 300 system lumens (600+ raw LED lumens) with 30 minute burn time using a rechargeable 14500 battery. Using a quality AA size disposable alkaline battery you will get about double the burn time with half the lumens.
• The DGX 600 Handheld Light features a true out-the-front 600 system lumens (1100+ raw LED lumens) with 60 minute burn time using a rechargeable 18650 battery.
• The DGX 800 Handheld Light features a true out-the-front 800 system lumens (1100+ raw LED lumens) with 90 minute burn time using two rechargeable 18650 batteries.
• The DGX 800 uses the same light head as the DGX 600, but a longer body incorporating two batteries means the increased power of the DGX 800 is 30% brighter with 50% longer burn time.

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. Unfortunately we have to mention the radiant lumens value because most other dive light suppliers use only the bigger number to inflate their descriptions.