
Originally Posted by
tony613
Yes, you have it right, and just as Mooreshire stated.
Paraphrasing from the product page, there are 4 main levels (High 1 and 2, Medium and Low), and each main level has two sub-levels. Your current selection of sub-level is memorized when the light is turned off and through battery changes. Strobe mode is never selected from off but always requires a double click from H2.
Also, in H1, the second sub-level for the cool white version has 420 lumens while the neutral white has 361 lumens. I tell you that because you are already using the H51W (neutral white) and your preference may be for a neutral so I wanted to be sure you knew.
One last thing: If you haven't already chosen an 18650 battery and compatible charger, I very highly recommend the protected EagleTAC 3100 mAh battery, and the XTAR WP2 II charger. In my humble opinion these are both excellent products and have performed extremely well for the last 6 months, with daily use from the battery and twice weekly (more or less) for the charger.