LED SMD Light Price, Supply, Wholesale, Manufacturer's Phone Number [Nanjing Wanshi Bo Electronic Co., Ltd.] 1. Brightness - The brightness of LEDs varies in price. LEDs for lighting should meet Class 1 laser standards. 2. Electrical Resistance - LEDs with strong electrical resistance have longer lifespans and thus higher prices. LEDs with electrical resistance greater than 700V are typically used in LED lighting. 3. Wavelength - Consistent wavelength in LEDs ensures consistent color, making such LEDs more expensive. Producers without a spectrophotometer for color separation find it difficult to produce pure color products. 4. Leakage Current - LEDs are unidirectional conductive luminous bodies; reverse current is termed as leakage. LEDs with high leakage current have shorter lifespans and lower prices. 5. Beam Angle - Different LEDs have different beam angles, with special angles being more expensive. A full-diffused angle is particularly costly. 6. Lifespan - Quality is primarily determined by lifespan, which is decided by lumen depreciation. Lower lumen depreciation results in longer lifespan and higher prices. 7. Chip - The luminous body of LEDs is a chip, and prices vary greatly between chips. Japanese and American chips are more expensive, while Taiwanese and domestic chips are generally cheaper. 8. Chip Size - Chip size is indicated by its side length, with larger chips indicating better quality and higher prices. Pricing is directly proportional to chip size.