US DOT 49 CFR Part 175.10(a)(23) "With the approval of the operator of the aircraft and as carry-on baggage, electrically powered heat-producing articles (e.g. battery-operated equipment, such as underwater torches and soldering equipment), which, if accidentally activated, will generate extreme heat and can cause fire. The heat-producing component, or the energy source, must be removed so as to prevent unintentional functioning during transport."
For more information go to http://asi.faa.gov/Docs/HAZMATByPassenger.pdf.
Any higher wattage would involve the use of rechargeable batteries to supply the increased power.
This happens occasionally when the bezel is screwed down too tight and allowed to remain in this mode for a long time. It is best not to store the light with the bezel fully tight. When making the seal, only a quarter turn past the point where the o-ring begins to be compressed is sufficient. Tighter does not make a better seal. There are several options. All require more force. Be careful not to try too hard and hurt yourself.
- Use 2 people. One person turns the bezel while the other holds the case.
- Heat the bezel in hot tap water before trying to unscrew the bezel.
- Use an oil filter wrench on the bezel. You can get more torque that way.
- Send the light to UK for repair.
Yes, our instruction states that Alkaline, NiCad or NiMH can be used for our LC100, C and D-lights. However, we only warrant UK lights against manufacture's defect. If the the battery you purchased from somewhere have some issue, it will not be covered under UK warranty.
The only lights which are intrinsically safe are the 3AA CPO, 4AACPO, and Vizion I lights which are rated Class I, Div 1 by ETL. Also all of our ATEX rated European lights are intrinsically safe.
Class I, Div 2 lights are not intrinsically safe, that are called non-incendive.
Candle power simply indicates the brightness of the center of the beam measured at 12 inches away. Lumen indicates the total amount of light being released in every direction. One would have to have detailed information about the concentration of the beam by the reflector and optics to even begin to make this calculation. We use the value of distance to indicate center of beam brightness. This indicates how far the light will shine until the spot is the same brightness as would be cast by the full moon. This weird measurement comes from the outdoor market.
Here are some values:
UK4AA Xenon 2400 cp
3AA eLED CPO 2400 cp
UK 4AA eLED CPO 3810 cp
SL3 6500 cp
Vizion I (high power not diffused) 1000 cp Aqua Sun eLED 8200 cp
These are not official values, but close.