Nitecore TUBE - a brief overview.
The TUBE is a small, rechargeable light from Nitecore. 56 mm long, it is less than 1 cm shorter than the Fenix E05, and actually slightly longer than Foursevens's Atom A0. It is however very light, and certainly not bulky, especially when considering it has a micro USB port for charging.
Official specifications:
Features
High performance LED produces 45 lumen on
high
Built-in rechargeable Li-ion battery provides a
runtime of up to 48 hours
Integrated intelligent Li-ion battery charging
circuit (micro USB charging port)
Single multi-stage switch offers access to all
functions via one-handed control
Features two brightness levels and infinitely
variable output mode
Features extremely wide 100° flawless beam
to light up peripheral vision
Constructed from durable Polycarbonate
materials
Dual metal key ring connector withstands up to
77lbs (35 kg)
Impact resistant to 1.5 meters
Extremely lightweight, compact and portable
Dimensions:
2.22” x 0.83” x 0.31” (56.5mm x 21mm x 8mm)
Weight:
0.34oz (9.6 gram) (with battery)
Accessories:
Key ring
The light comes in a plastic/cardboard blister container, the kind you need a pair of scissors to open. Specifications are printed on the cardboard, and those familiar with Nitecore packaging will instantly recognize the black and yellow theme.
The only accessories are two small split rings.
My overall impression is that this is a reasonably sturdy light, but it may have a couple of weak spots: the USB port cover is attached to the body by a very thin piece of rubber that could probably be torn off quite easily, or worn out by grinding against keys or other objects on a keychain or in your pocket. The other potential Achilles heel is the hard, inflexible plastic the body is made of; while I have no reason to doubt the light would withstand a drop from 1.5 m, as claimed by Nitecore in the specifications, I am not so sure it would fare well if a heavy object were placed on it. Of course any light will be damaged if subjected to rough enough treatment.
I have just completed a runtime test, and after running the light continuously on high for 60 minutes, there is still a noticeable difference between high and low. In my estimation the output on high is now ~5 lumens. (to my eyes roughly the same output as the Zebralight SC62d on M2 (6.6lm))
The light has an additional blue LED to indicate charging. This LED is turned off when charging is completed. Even though the TUBE has an ”intelligent protective circuit” that ”ceases charging automatically when power level reaches 100%” I don't recommend leaving the light unattended during charging, or charging it overnight.
One thing that sets the TUBE apart from many other keychain lights is the user interface. For a light of this size and at this price point, it is relatively advanced. A single button gives you access to low, high, user selectable output and momentary on (high).
For operating instructions, go to
http://www.nitecore.com/UploadFile/Files/download/1-1_TUBE_UM_en.pdf
Gallery:
Clicking on the link below takes you to a short video (hosted by tinypic.com) that shows the infinitely variable brightness mode.
View My Video