" ... Great amount of light, much more than any of my mag lights and in a smaller overall package. It has a great floodlight patter that is not too harsh even up close, but it will still light up my backyard from 30 yards away. It does not get hot as I would have expected. ... "

Manufacturer of dynamo-powered LED bicycle lighting.

Site about one of the earliest counterweighted balanced-arm desk lamps " ... Initial experiments led Buquet to take advantage of the lever laws:he connected two pipes with the help of two glide bearings.He then added adjustable weights to each end of both pipes. This allows to put the system in any desired position without the use of additional set screws or springs. ... "

" ... Glow rings are filled with tritium which is housed in a high-density borosillicate glass shell that measures approximately 5mm. This self illuminating safety device is ideal for marking equipment and personal property. Kit markers can be seen from 30m away and are waterproof to a depth of 30m. Designed to glow for 10 years. ... " -- the halflife of tritium is closer to two years, so ten years is very much a stretch.