Teach you to tell the energy efficiency rating of led lights
LED bulbs, the energy efficiency rating has a clear national standard, that is, GB 30255-2013, his energy efficiency rating is divided into three, one of the lowest energy efficiency is 3,
LED bulb energy efficiency rating:
Initial luminous efficiency: the ratio of the initial luminous flux to the actual power, lm / W;
Color code, 65 refers to the 6500K, 50 refers to the 5000K, 40 refers to the 4000K, 35 refers to the 3500K, 30 refers to the 3000K, 27 refers to the 2700K,that mean the warm white led P27 for the color coordinates close to the Planck curve, color temperature 2700K;
Full light: beam angle greater than 180 °. The light intensity at any angle in the range of 0 ° to 135 ° does not exceed 20% of the average light intensity over the entire area; the luminous flux in the 135 ° to 180 ° region should be no less than 5% of the total luminous flux.
Semi-light: beam angle greater than 180 °, light distribution does not meet the "all with light" type.
Quasi-fully equipped light: light beam angle of not more than 180 ° non-directional lighting type.
From the table we can see:
1, high color temperature bulb light efficiency is higher than the low color temperature, about 10% higher;
2, level 1 of the light efficiency close to the level 3 of 2 times;
3, semi-light / quasi-full light with the luminous efficiency of more than about 15% of the total light distribution.
When using the recommended high efficiency LED bulb, level 3 is the minimum requirements must be met. The table is suitable for rated power 2W ~ 60W, rated voltage 220V, rated frequency 50Hz LED bulb.