LEDs are not LASERs and cannot LASE. If you want a small LASER, spend the money for a real LASER Diode. They are relatively cheap these days.
There is a small chance that a large number of bright LEDs might be usable as a pump for a dye laser. Try researching that. Still I'm sure a COTS LASER Diode would be easier and cheaper.
in the past if not they would be using ray guns and lasers
I would suggest using a 3d printer and thingiverse.
That would be in 1982.
If the colonists had lasers I do not think there would have been as many American casualties in during their revolution...to answer your question, no, lol :)
On the outside.
No, lasers would not cause nuclear changes, they would only melt or vaporise material which is not what is wanted. The nuclear properties of the waste would remain the same.
A working model can be made using many different materials. An idea for a project would be using cardboard to make a model of Pythagoras Theorem.
The PP-1000 1MW RF wireless present is an exceptional model. It doubles as a USB device. It has one of the strongest and most clear lasers on the market today.
The first rock group to use lasers in a live performance was Pink Floyd in the early 1970s. They incorporated lasers into their shows for their "The Dark Side of the Moon" tour.
* that would depend if he was using lasers or phasers. if it were lasers, definitely a space war. If super sonic phasers, I would opt for the ring. In either case, headgear would be needed, due to the opponents proclivity of ear chomping. * If you had him cornered in a Space War, then you would use your lasers to blast his head off. You don't get that advantadge in the ring. So, the voting score is Ring-A half, Space War-1 and a half. * definitely the space battle - the space battle would be definitely exciting. something to look out for. if you win you would be a hero. if you loose it would be the way to go.
That one
If you are asking "Do lasers run on electricity?" Then the answer would be "Yes, Most of them do."