According to JETBeam specs, the lens is sapphire crystal and the body is T6061 T6 aluminum with a type III hard anodized finish. The dimensions: Bezel diameter – 25mm, Tail diameter – 19mm, Overall length – 100mm, while the weight is 50g.
The push button tail cap switch is a “reverse” click type, i.e., the switch will make or break contact after it clicks. I prefer the “tactical” or forward click switch – a forward click switch will allow a half press of the switch to turn on a flashlight.
I tried fitting two forward click switches – one that I removed from my LumaPower D-Mini Digital and a McClicky switch. Neither fit. Unable to find a forward click switch, I settled for replacing the black tail cap with a glow-in-the-dark silicone tail cap.
Because the Jet-I Pro flashlight will accept an input voltage of up to 4.2V, it can use a rechargeable 3.7V 14500 Lithium battery. The Lithium battery gives a not insignificant 100 more lumens when compared to a 1.5V Alkaline AA battery or a 1.2V rechargeable NiMH.
The main attraction of the Jet-I Pro is the I.B.S. (Infinite Brightness Setting) technology. The I.B.S. circuit allows for three operating modes, A, B and C, each of which can be set at any output of ~2 to 225 lumens. Any mode can also be set to one of five strobe modes including 1Hz to 15Hz, warning signal, standby (flash once every 8 seconds), 100% SOS and 5% SOS.
When reading about programming the flashlight, it seems complicated. In practice, it’s relatively simple. BugOutGearUSA.com has a page with the Jetbeam I.B.S. User Interface Instructions.
Output & Runtime (from JETBeam):
Max Output: 130 Lumens, lasting for one hour;
High Output (Default Mode A): 110 Lumens, lasting for 75 min;
Low Output (Default Mode B): 20 Lumens, lasting for 3.5 hours;
Minimum Output: 2 Lumens, lasting for 45 hours;
Max output: 225 lumens, lasting for half an hour;
High output (Default Mode A) 180 lumens, lasting for 45 min;
Low output (Default Mode B) 20 lumens, lasting for 8 hours;
Minimum Output: 2 lumens, lasting for 50 hours;
Compared to my modded LumaPower D-Mini Digital (Cree Q5, DX 7612, single RCR123 and McClicky) the Jet-I Pro wasn’t as bright. But the D-Mini’s reflector is smooth, is deeper and 50% larger in diameter. The JETBeam Jet-I Pro I.B.S. is a great flashlight for its size and versatility.