Tesfish 5 V WS2812B LED Strip Light, 5 Metre RGB LED Pixel Strip 5050 150 LEDs IP30 Flexible Full Colour Individually Addressable Smart LED Light Strip for Advertising Decoration DIY Projects : Amazon.co.uk: Lighting
Pixel grid device units
Beware of DORI – Don't be seduced by the lies
Flexible RGB LED Strip (aka DotStar, APA102, SK9822) – 144 pixels per metre
Meter To Pixel Converter
Box2D and the Pixel Per Meter Ratio - Sean Ballais