This is what they will most likely look like
they will be workable from the off but the builder may want to do some finishing work IE rounding off the corners and stuff like that .
the build will be pretty easy if you can solder and drill holes with a certain degree of accuracy .
of course there will be full instructions
ball park figures are
single diy light 900 lumens £75/£80
double a tad more
input voltages
single will run from 1 LiIon or multiples in parallel
3.7 volts
double will need a 7.4 volt pack
or with a more expensive driver the double can use any voltage up to 20v but no lower than 7.4 v
all drivers will have programmable modes at the click of the button