The Glo-Toob lithium was design for use as a beam style light ideal for hiking, scuba diving and general outdoor activities. It makes a really convenient replacement for traditional chemical-based light sticks as its generally smaller and lighter. Right at the top sits the switch cap. The Glo-Toob comes with 2 different switch caps. The twist switch cap turns on by twisting its external ring. It doesn't matter which direction you twist it, it basically works like a toggle switch. The twist switch cap comes with a key ring as well. The twist switch cap is rated as being waterproof down to 11,500 feet so this is the cap to use of the Glo-Toob will be submerged in water. While talking about submerging, note that the Glo-Toob isn't buoyant. The push button switch cap is splash proof, it uses a reverse push button switch which provides slightly longer than average travel and gives a positive tactile feedback when clicked. It has a band of knurling and a hole along its side for lanyard attachments. Both switch caps come with a thick nitrile washer. The internal battery tube is made of thick aluminum, the external transparent body is made of epoxy resin. I did notice some chips and minor scratching on the resin but it doesn't affect practical usage of the light. The entire light extremely durable as every part is thick and tightly fitted together. The electronics are potted at the bottom of the light, you can actually see the electronics from the sides. There are 3 5mm LEDs which provides a constant, full 360° viewing angle. The Glo-Toob is available in a variety of colors, the one reviewed here has white LEDs.

If you're unfamiliar with any of the terms used in this review, click here for explanations on common flashlight related vocabulary.

The Glo-Toob Lithium provides a relatively dim light, but this is fine as it's meant to be used as a beacon and not for shining on objects. It has a total of 11 modes which can be cycled in the following order.

Equal Flash > Beacon Strobe > Fast Strobe > Slow Strobe > S.O.S. > Pulse > Half Flash > Bounce > Ramp Up > 100% Constant On > 25% Constant On

The light doesn't have any form of regulation as can be seen from the graph below. The output at 100% constant on level drops sharply within the first few minutes to about 75% of initial output.

The Good - Very tough, all parts fit securely together. Variety of modes are enough for almost any application.

The Bad - No regulation of output modes, light dims as battery drains down.

The Relative - White light has a slightly violet hue to it as do most 5mm LEDs. Option of push button or twist switch cap.

Twist switch cap (top view).

Twist switch cap (side view).

Twist switch cap (bottom view).

Push button cap (top view).

Push button cap (side view).

Push button cap (bottom view).

Cap cover (top view).

Cap cover (side view).

Cap cover (bottom view).

Body (top view).

Body (side view).

Body (bottom view).