Durability, whether you prefer flood, spot or adjustable beams, and the type of light -- LED, incandescent or krypton -- are other important factors to consider.
After all, you don’t want your light to die in the middle of the night when you’re trying to navigate back to camp. First, consider the type of batteries the flashlight requires. Some may use ...
An Aston University researcher has developed a new technique using light which could revolutionize non-invasive medical diagnostics and optical communication.