This xtar D26 2500 light has launched with long & short types. Both of them have four lighting levels. The long version requires two 26650 batteries. It provides max 2 hours burn time at Turbo mode (2500lm) with 2 x 26650 5200mAh batteries. If you are looking for powerful and longer runtime dive light, the long version would be suitable. And the short version needs only one 26650 cell, with run time up to 1.6 hours. It is more portable, easy to be used with the goodman handle.
A testing video by @AbyssTek:
A testing video by @AbyssTek: