Making a battery powered navigation light. Don't want to use 12v due to size.
Basically my thought is if I can buy a 2xaa battery powered led torch which is stupid bright it should not be too hard. If I had half that light in each direction (back to back) on 2xaa cells it would be perfect.
Looking at running on 3v (2 x aa cells) or 6v (4 x aa cells). Most led's throw light in one direction which means the light is somewhat wasted as it is not in the direction I need it in (360 degrees pointing outward from the center).
Currently thinking of this: (pic below) although I suspect it is really built for 12v and they just advertise it as 6v.
How much heat would this cause?
It is apparently 0.8w how do I work out how long it will last on 4 x 1.2v 1900mah batteries?
Any better ideas?