Backlighted Keyboard

Sometimes, I work at night on my laptop, but I do not want to turn the room lights on, because then, my wife won't be able to sleep with the lights on. So I just bought a backlighted keyboard from CDR-King, a Php480.00 purchase. I had to glue, using Magic Bond, footers for the keyboard, so that I can use it on top of the built-in keyboard without damaging the built-in keyboard.  The only drawback is that CDR-King's keyoard is PS/2 and not USB, so I had to get a PS/2-to-USB cable. The backlighting works as follows: the entire keyboard is backlighted, and the black-colored characters show through the semi-translucent keys. I would much prefer more translucent keys, to provide greater contrast between the keys and the characters printed on the keys, to provide better visibility of the characters.

Now I can work at night, without disturbing the wife. Maybe, this is bad for our domestic life, and so I should not work at night on a regular basis.