High power LED energy saving lighting lamps energy-saving really?

LED lighting energy saving lamps energy-saving really? First of all, we have to clarify the concept of energy saving, accurately speaking, under the same definition ( Light source color rendering index quite) Under the premise of effective unit area of the same intensity of illumination, the lower the power consumed by a light source is the section

the LED energy-saving lighting street lamps energy-saving really? First of all, we have to clarify the concept of energy saving, accurately speaking, under the same definition ( Light source color rendering index quite) Under the premise of effective unit area of the same intensity of illumination, the lower the power consumed by a light source is more energy-saving. There are a few key points: first, the same clarity, clarity depends largely on the color temperature of light source, because the k - 5000 6500 k white light can maximize the reduction of original color object, definition of the nature in the human visual is higher. Second, effective per unit area, effective unit area refers to our actual needs, lighting the area of the site, usually refers to the ground need lighting, desktop, etc. Why should emphasize effective area, this design to a light distribution problem, because many sources are 360 degrees or 180 degrees, and we need the lighting Angle may be 120 or 90 degrees. Third, the intensity of illumination by the same power consumption is smaller, because the power supply company is according to the power of electricity, so, of course, is power, the smaller the less power consumption, it should be pointed out that the consumption of power and there is no direct relationship between the power factor, power factor the impact is not power, is only a matter of involving the line loss. That how to obtain under the premise of equal intensity of illumination for the less power to light? It involves two questions: one is the source of the luminous efficiency problem, but the utilization rate of light, the higher light efficiency, that is to say, the light source of light utilization rate is higher, then the light source the same lighting power is smaller, nature is more energy-saving. Now we use these standards to measure the LED energy-saving lighting lamps, first look at color rendering index, color rendering index of energy saving is generally around 70, pure tricolor phosphor powder should be able to do 75, should be the color rendering index is good; 2 it is to see the lights, LED energy-saving lighting lamp lighting in 45 - generally 50 lm/W, pure tricolor phosphors 50 - should be able to do 55 lm / W; Finally see the utilization, because of the surface light source LED energy-saving lighting lamps, light emitting area is larger, with the light itself is difficult, and the LED energy-saving lighting lamp spiral tube or u-shaped tube light of the basic is horizontal, and we all need light is usually a vertical direction, so you need a big mirror cover to change the direction of the light as down, however, despite this don't do precisely control the light Angle problem, and the process of light loss is relatively serious, conservative estimates will be 10 - The loss of 20% of the light. In addition, the LED street lamp, spiral tube or u-shaped torch pipe itself will be covering a large part of the light, this part can't be used alone, according to estimates the accounted for the total luminous flux of 15 25%. That is to say, it is energy saving light efficiency can reach 55 lm/W, after the two losses, the actual is 30 - light efficiency 40 lm / W。 So, in fact, LED energy-saving lighting lamps can actually be used light efficiency is very low, and that is why we put the LED energy-saving lighting lamp installed after look space visual effect can also, but the measure ground illumination is very low.