Me too. I need a sample so I can finish this game.
Hopefully, this will be clearer. (It's from http://www.geocities.com/jaapsch/puzzles/lights.htm#descmini
This is an easy puzzle once you know the following two facts:
1. To change an individual light, press it and its four neighbours.
2. To know whether you need to press a button or not, check its own light and the neighbouring lights. If an odd number of these 5 lights are switched on, then the button needs to be pressed, otherwise it does not.
The following solution then suggests itself:
a. Use fact 2 above on all the buttons in the middle two rows.
b. For each light that is on in row 2, press the button above it in row 1.
c. For each light that is on in row 3, press the button below it in row 4.
A light's neighbors are the lights immediately above, below, left, and right of it:
A B C D
1 * * * *
2 * * * *
3 * * * *
4 * * * *
B2's neighbors are B1, A2, B3, and C2.
B1's neighbors are B4, A1, B2, and C1.
D3's neighbors are D2, C3, D4, and A3.
A4's neighbors are A3. D4. A1, and B4.