OK
your all going about this the wrong way
the idea is we dont have enough light where infact theres plenty its just not getting to the keys
ive taken a few pictures what ive done
but the idea is to basicly scratch the surface of the perspex
to emit the light to the keys.
the keys on mine are not done propper as yet you will see what i mean on the pictures
but i will get around to it
i hope this help
just one thing it works and is the way around this problem
you can see for yourself just how bright the keys are :bounce:

on my dull keys i will scratch the other side of the perspex.
i dont want to go to deep it might crack
i will let you know how it goes soon as ive done it