This 20w light is machined from aluminium and then black hard-coats for optimal heat sinking.  As these lights produce a significant amount of heat we advise not using them in air.
20 Watt LED with 4770 Lumen Output @ 6500 Kelvin
Variable output with five Piezo controlled levels of output.
Level 5 - 4770 Lumen
Level 4 - 2915 Lumen
Level 3 -  1325 Lumen
Level 2 -   265 Lumen
Level 1 -   100 Lumen
Rotary switch activation with double o-ring seal
Powered by a 5.2Ah Li-Ion battery
150 minutes of burn time at level 5 (40 hours at level 1)
Recharge time from complete discharge 3 hours
Length 9" (23 cm)
Diameter 2" (5 cm)
3 year limited warranty
UN 38.3 Test Compliant - BATTERY IS SAFE FOR AIR TRANSPORT
Depth rating 150m+
Package includes light, charger, US power cord with UK adapter
Dry Weight 1.1kg and in water 0.34 kg negative