http://www.elitesemicon.comThe energy efficiency requirements for LED bulbs and led high bay in US are mainly based on Lighting Facts label, Energy Star and DLC for LED Lights . These are all voluntary requirements.
The energy specifications in Lighting Facts label:
The original intention for the label is to “Give them the Facts”, which is to make LED Lighting products reach more specific and more reliable energy efficiency standards:
1) Performance parameter: initial lumen (lm), initial luminous efficacy (lm/W), input power (W), related color temperature (CCT) and CRI.
2) Indicators which are “quality guarantee” and “lumen maintenance” indicators.