We use GY-302 I2C light detector. We got it with pins, but we don't need pins. We solder thin maylar isolated wires.

Fig. 2.01 Light detector GY-302  (BH-1750 chip).

We made box for GY-302 and RGB  LED WS2812

Fig.2.02 Box for LED and GY-302.

Fig. 2.03  Box with LED and GY-302.

Now we can make som experiments with color.