Haven't I typed all this up before?
1) Open the power board and unplug the light, then carefully remove the hood assembly from the tank by removing the white hinge rods.
2) Place the hood on its back on a towel or soft surface, unscrew the eight plastic screws that secure the light cover, remove that, then pull the light tubes out. Use a small screwdriver to lift out the six plastic plugs and remove the those six screws and the two holding the light tube clips in.
3) Carefully flip the whole assembly over, and carefully seperate the top cover from the rest of the assembly. You will see the LED controller in the corner by the timer.
4) Remove the moonlights or whatever you are replacing, and fit the replacements. You will need some sort of glue for the LEDs
5) Assembly is the reverse of the above.