In order to accelerate the commercialization of LED lighting, North American Energy Star has set different test specifications for LED lighting products, including ambient temperature test, integrating sphere measurement, light distribution curve, etc., defined by LED lighting product testing methods. The consistency of the LED lighting device is excellent, which is conducive to quality upgrade. Energy Star has issued a definition of testing specifications for solid-state lighting products. The document contains the test items, specifications for the test methods, the number of samples to be tested, and the specifications for the conformity determination. Authorized laboratories also have clear instructions. Among the specifications cited by ENERGY STAR for solid-state lighting products, the parts that are different from traditional lighting include ANSI C78.377-2008, North American Lighting Association (IESNA) LM-79-08, IESNA LM-80-08 Specification (Figure 1), this article will only describe the inspection details of ANSI C78.377-2008 and IESNA LM-79-08, and introduce the principle of equipment required for testing. Solid state lighting fixtures have a wider color temperature rating This specification contains definitions of light color characteristics for solid-state lighting products in the US National Standard, which are suitable for indoor use, excluding outdoor lighting. Among them, there are two main points, one is to define the relative color temperature (CCT) classification, and the second is to define the range of color temperature variation allowed for the same relative color temperature nominal level. The light color specification requirements for solid-state lighting described in the specification are derived from the color grading specifications of fluorescent lamps, but in view of the fact that solid-state lighting is still in its infancy, as fluorescent lamps have matured, so when defining light color requirements, take Larger range of variation. The current specification distinguishes solid-state lighting fixtures into eight color temperature grades, which are 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5700K, and 6500K (Figure 2). Eight relative color temperature values ​​are defined in the area of ​​CIE 1931 The six elliptical blocks in the figure define the color temperature level block of the fluorescent lamp for ANSI C78.376, and the color temperature allowed for the variation range is the seventh-order MacAdam ellipse range. For solid-state lighting, the range of variation is allowed to increase, and the eight diamond blocks in Figure 2 are the eight color temperature levels of chromaticity coordinates (x, y) for solid-state lighting. Color temperature grading helps solid-state lighting suppliers and users have a common color temperature standard language. In addition, this specification also defines the Color Rendering Index (CRI) as another indicator for evaluating the color characteristics of solid-state lighting. The way to measure the color characteristics corresponds to the LM-79 specification. Solid-state lighting is not suitable for traditional measurement IESNA definition new method IESNA LM79-08 was released in 2008 as the standard specification for test methods for the luminous efficiency of solid-state lighting (unit: lumens per watt (lm/W)), luminous flux (unit: lumens (lm)), light intensity The spatial distribution, chromaticity, chromatic aberration, uniformity of light color space, relative color temperature and color rendering are measured and defined by the corresponding equipment requirements. Previously, traditional lighting used to measure lamps and light sources separately. However, solid-state lighting may have a combination of lamps and light sources. Therefore, the specifications originally defined for traditional lighting do not apply. IESNA has specially formulated this specification, and hopes to define the parameters of solid-state lighting characteristics by measuring the program parameters, and to measure the reproducibility and unify the photoelectric characteristics of solid-state lighting products to avoid different measurement methods. dispute. This specification applies to solid-state lighting products that use LEDs, including electronic controls and heat sinks, and are driven by AC or DC power. The solid-state lighting products covered by this specification are lighting products that combine luminaires and light sources, such as integrated LED bulbs, and do not include solid-state lighting that requires additional electronic controls or heat sinks (such as LED chips, LED components, and LED modules). The product does not cover lamps that are used by LED light sources but do not include LED light source sales. In addition, this specification does not apply to determining differences in product performance between individuals. Test environment temperature must be controlled This specification defines the ambient temperature at the time of measurement to be 25±1°C. When measuring, the temperature measurement point must be within 1 meter of the lamp, and the height must be the same height as the lamp and avoid the radiant heat effect of the light source. Fixtures for fixing lamps during measurement must also avoid heat conduction and hinder the natural flow of air. In addition, the optoelectronic performance measured by this specification does not require a light source or fixture to be tested for 1,000 hours after lighting. In order to ensure that the lamp to be tested is stable during the test, the lamp must be heated before the test to balance the temperature, and the heat lamp time depends on the lamp. For example, the integrated LED bulb can reach equilibrium in about 30 minutes. Large fixtures can take up to an hour or more. Whether or not a stable standard is reached can be determined by the performance of the light source output such as the light intensity or power consumption of the fixed point. If the heat lamp is 30 minutes, take at least three measured values ​​in 15 minutes, and divide the difference between the maximum value and the minimum value by the average value. The result must be less than 0.5%. This can determine whether the lamp has been completed by the heat engine, and the actual heat lamp time. Must be indicated in the test report. The way the lamps are placed during the measurement process shall be the attitude of the lamps under normal use. This specification defines two measurement methods for luminous flux, one using an integrating sphere system and the other using a light distribution curve system. Which system to use depends on the amount to be measured (color, light intensity distribution) and the size of the sample to be tested. The integrating sphere measurement system does not require darkroom conditions This method is suitable for measuring the full luminous flux and color characteristics of small-sized solid-state lighting fixtures. Its advantage is that it can be measured quickly and without darkroom, and the air disturbance can be reduced during the measurement in the ball, but for the heat sink The integrated luminaire should pay attention to the heat dissipation and cause the temperature to rise. LM-79 has several key points for the selection of the integrating sphere: firstly, the size of the integrating sphere should be large enough to avoid the heat generated by the lamp body from increasing the temperature and the self-absorption of the document board and the lamp body to be tested. Measurement error. For the size of the integrating sphere, if measuring small bulbs (such as traditional bulbs, power-saving bulbs), it is recommended that the sphere diameter be ≧1 m; measuring 4 呎 (about 120 cm) of fluorescent tubes, HID lamps and other larger lamps Type, it is recommended that the diameter of the sphere is ≧1.5 meters; for measuring the lamp type of 500W or more, it is recommended that the diameter of the sphere be ≧2 meters. The geometric architecture defined in the specification for each device using the integrating sphere is shown in Figure 3. There are two kinds, one is 4π and the other is 2π. In the 4π geometry, the total surface area of ​​the solid-state lighting product should not exceed 2% of the total area of ​​the ball wall. For example, in a 2-meter integrating sphere, if the object to be tested is a ball, its diameter must be less than 30 mm. In the case of a linear product, its longitudinal dimension should be less than two-thirds of the diameter of the ball. In the 2π architecture, the opening diameter of a solid-state lighting product installed should be less than one-third of the diameter of the ball. In addition, the fixture of the fixed luminaire is not heat conductive to avoid affecting the temperature of the sphere. The geometry of the integrating sphere device. (a) is a 4π structure, the lamp body is placed at the center of the sphere, and (b) is a 2π structure, which is suitable for a front-illuminated light source, and the lamp body is placed on the side of the sphere. The internal coating reflectance must be 90 to 98%. The reflectivity of the coating in the integrating sphere is relatively high, and a higher signal can be obtained during the measurement, and the error caused by the uneven spatial response in the integrating sphere and the variation of the solid-state illumination light intensity distribution can also be reduced. However, when the reflectance is high, the effect of the size of the sphere opening on the average reflectance needs to be evaluated. An auxiliary lamp should be installed in the integrating sphere, and its function is to evaluate the self-absorbed part of the lamp body to obtain a self-absorption factor. The size of the baffle should be as small as possible, but it must be able to prevent the ball from being allowed to measure the maximum size of the lamp body. The placement of the document board is generally recommended to be from the detector, and the distance between one third and one half of the radius of the sphere is the document board position. In addition, the auxiliary light must also have a baffle, which acts as a direct light detector. Quartz tungsten incandescent lamp commonly used for calibration 
