1, color temperature: conventional color temperature: warm white light (WW)2700-3200k, natural light (NW)4000-4500K, positive white light (PW)6000-6500K, cold white light (CW)7000-7500k. The cold white light here is different from the cold white light of jewelry lamps.

2. Power: The general power of LED bulb lamps is below 12W. Common LED bulb lamp power is divided into: 3w, 4w, 5w, 6w, 7w, 8w, 9w,10W..

3. Voltage and current: Voltage and current are also very important basic parameters of LED bulb lamps. The grid voltage in different countries in the world is different from that used in some occasions. Commonly used voltages are 12v, 1 10v, 220v and 85v-265v. Current is divided into input current and lamp bead current. First: input current: it can pass the power supply test. Different forces are different, depending on the instrument. Second, the lamp current: the general high power is 300Ma-320Ma-. Current has a great influence on the light attenuation of LED lamps, so the stability of current is also very important. The current and voltage of the lamp bead should not be too large, otherwise it will seriously affect the life of the LED lamp.

4. Light efficiency: Light efficiency is also an important factor of LED bulb lights. At present (2065438+August 2003), the luminous efficacy of lamp beads using chips such as Riya and Ke Rui is generally around150-0lm/w. The luminous efficacy tested in laboratory environment is not considered here. Up to now (2065438+March-April), the highest luminous efficiency of the laboratory announced by Ke Rui is 276Lm/W, and the luminous efficiency of the lamp beads of chips in Taiwan Province Province is basically around 100- 130Lm/W at present.

5. luminous flux: luminous flux is mainly determined by the light efficiency and power of LED bulb lamp. Generally measured by integrating sphere.

6. Illumination: Lighting designers generally consider illumination. In general, we think very little. The unit of illumination is Lux, which can also be abbreviated as Lx in English. The illuminance generated by the luminous flux of 65438±0lm is evenly distributed on the surface of 65438±0 m2. Illuminance is usually measured by an illuminance meter, which is simple to use and cheap to buy. When there is no integrating sphere system, the illuminance meter can be used as some reference.

7. Light decay: In general, light decay is how much the brightness of the bulb lamp has dropped after a certain period of use. Heat dissipation and current are the main factors affecting LED light attenuation. If the current is unstable and the heat dissipation effect is poor, the light attenuation will be very serious. If the isolated constant voltage+constant current LED driving power supply is used for LED bulbs, the aluminum lamp shell of the automobile dissipates heat and the light attenuation should be controlled within 2‰.