Nanjing LED SMD Light Price, Wholesale, Manufacturer's Phone, Which is Cheaper [Nanjing Wesibo Electronic Co., Ltd.] 1. Brightness - LED brightness varies, affecting price. LEDs for lighting should meet Class I laser standards. 2. Anti-static Ability - LEDs with strong anti-static ability have longer lifespans and are more expensive. Typically, LEDs with anti-static ratings over 700V are used for LED lighting. 3. Wavelength - LEDs with consistent wavelengths have uniform colors, making them more expensive if color consistency is required. Manufacturers without a spectrophotometer find it difficult to produce products with pure colors. 4. Leakage Current - LEDs are unidirectional conductors. If there's reverse current, it's called leakage. LEDs with high leakage currents have shorter lifespans and are cheaper. 5. Beam Angle - Different LED applications have different beam angles. Special beam angles are more expensive, such as full diffused angle. 6. Lifespan - The key to different quality is lifespan, determined by lumen depreciation. Lower depreciation equals longer lifespan and higher prices. 7. Chip - The light-emitting body of LEDs is a chip, with different types of chips.