Something for hot summer .... (and bored from maglite mods )
BMW for sometime develops (blue ) laser head lights http://wot.motortrend.com/bmw-shows-...rk-126103.html
Point it is to with blue laser ( probably have most energy due wave length ) radiated phosphor capsule to white
Well .... we have powerfull blue lasers http://www.wickedlasers.com/lasers/S...ies-96-37.html (1W!!! )
Concept of divelight is well known ..... test tube diving light
All you need is to fix phosporous capsule in that test tube and blow it with laser....... who will be the first ?
and autonomy of that light should last ... ;-)