# Table 1 Efficiency and efficacy of some common LEDs at 100 mA per mm2 (near-optimal efficacy) and a 25 °C junction temperature

LEDPeak wavelength or correlated color temperatureEfficiency (W W−1)Photon efficacy (µmol J−1)
Blue450 nm0.933.5
Green530 nm0.421.9
Red660 nm0.814.5
Far-red730 nm0.774.7
Cool white6500 K0.762.9
Warm white2700 K0.692.6
1. Data derived from company websites (see below). The conversion of efficiency to photon efficacy depends on spectral distribution