Q&A Q: How 50w and 70w change 3 colors? A:They are changed by switch, turn on-off-on,will change the colors. Only 50w and 70w can change colors. Specification : Voltage : AC220V LED Type : SMD2835 Diameter: 26cm(16W)/33cm(22W)/40cm(30W,50W)/50cm(70W） Thickness: 5cm/7cm Shell Color:Black/White/Blue/Pink/Yellow/Green Emitting color:cold white(6500K) Tricolor: warm white(4000K)/natural white(5000K)/cold white(6500K) Warranty : 1 year Color Rendering Index : Ra80 Lifespan : over 50,000 hours Features: 1.High Power,super thin,large diameter,super bright. 2.High light transmission lampshade, high brightness 2.IC driver,constant current,no flicker 4.Ultra thin,saving your space 5.Easy to install. Only two steps to completed the installtion Package Include : 1pcs*LED ceiling light #ledceilinglight #ceilinglight #ceilinglamp #macaronceilinglight #superthin #coolwhite #tricolor #colorchangeable