The tricolor of thise series of lamps are red, blue and green , the merochrome is a milkwhite lamp ball, through the program-controlled circuit inside, it could be changed to seven color (transition) or full color (gradually), and can be accembled into Lines with lamps in two-dimensional plane or three-dimensional modeling.the colors are changed automatically with runing lights. Energy saving,cold light,high efficiency,with long life and easy to install without controlling by connection line.there are various colors to for your choose: red / yellow / blue / green / white