The 1 meg resistor is a LDR
R1 470 ohm can be between 470 - 1k ohm
Experiment with different resistance till the lights light.
R3 10 ohm can be more or less depending on the brightness you want.
I have used slow flashing rgb diodes for this and covered with hot glue so the color blend's to 16 color scale. My wife and kids liked the project. It's cheep and battery operated with a 18650 lipo.
