{"title":"Round Semi-Circle Backlight LED - 50mm Diameter","handle":"round-semi-circle-backlight-led-50mm-diameter","url":"/products/round-semi-circle-backlight-led-50mm-diameter","description":"A 50mm diameter plastic diffused backlight LED that produces near-uniform white illumination from a slim semi-circle of acrylic. Originally designed for LCD gauge displays, these backlights are encased in a 2.2mm thick diffusing acrylic that spreads light evenly from just two internal white LEDs.\n\nA built-in reflector on the flat side directs all light output through the top surface, maximising brightness. Drive it just like a standard LED at approximately 3V and 30mA. The diffused surface can be masked with vinyl, drawn on with markers, or tinted with colour gels for creative effects — making it a great alternative to EL panels for wearables without needing an inverter.\n\nKey Features\n\n\nUniform Diffused Light – Special acrylic evenly spreads light from two internal white LEDs\n\nBuilt-In Reflector – Flat-side reflector directs all light upward for maximum brightness\n\nSimple to Drive – Operates like a standard LED at ~3V / 30 mA\n\nCustomisable – Mask with vinyl, draw with markers, or use colour gels to change the hue\n\nBrighter Than EL – Higher brightness and lower power consumption than electroluminescent panels, with no inverter required\n\n\nSpecifications\n\n\nDiameter – 50 mm\n\nThickness – 2.2 mm\n\nShape – Semi-circle (dome top, flat reflector bottom)\n\nLED Colour – White\n\nOperating Voltage – ~3V\n\nOperating Current – 30 mA\n\n\nIdeal For\n\nWearable electronics and costumes\nCustom indicator lights and gauge displays\nArt installations and light-up projects\nBacklighting for small LCD panels\n\n\n\nNote: This backlight is rigid acrylic — it is not flexible.\n\n\nPackage Contents\n\n1× Round Semi-Circle Backlight LED (50mm)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3372,"title":"Default Title","sku":"AF-4882","price":6.37,"on_sale":false,"in_stock":true,"available_quantity":26,"option1":"Default Title"}]}