Blocky block lights can be combined into creative combinations suiting your unique personal tastes. Blocksare cubic with one lighting face and five connecting faces.You can combine two or more of them together to build whatever you want.They need external power or a battery pack (sold separately). And they have 6 body colors: black, white, red, green, blue and clear.The light colors are white, off white, red, green andblue .Blocky block lights can be used for decorative uses, general lighting, or as flashlights. ...