LED bulb is designed to replace incandescent spherical energy-saving products, such products currently on the market, mostly in less than 10 watts (1 watt to 10 watts specifications), to replace the bulb wattage at 60 watts and below .
LED lights sold commercially integrated optical efficiency of 60 — 100 lm / W, CRI 60 — between 90, 2700 — 6500k color temperature between life 20,000 — 50,000 hours, each manufacturers of LED light indicators are not the same, for the species, many brands of LED lighting products, how do we choose the LED lamps do they need? General customers may not understand some of LED lamps expertise in order to make the average person to understand the performance of LED lamps, the following will make some brief.
1, LED lights integrated light efficiency means a finished luminous efficiency of LED lights, which at the rated voltage, the LED lights emit a total luminous flux divided by the total power consumption of the LED lights, the resulting value that is this LED integrated luminous efficiency, with lumens / watt that higher values ??indicate that the light energy better. The more power, you should select lumens / watt high LED lamps.
2, the color index is set to 100, generally considered :80-100, the color is good, 50-60 —- 79 CRI general, <50, the color is poor. Should be selected high CRI LED lamps.
3, Color temperature is measured in Kelvin (K), the red light source color temperature of about 800 — 900K, yellow-white color temperature of about 3000K or so, about a white light source color temperature of about 5500K, the color temperature of the light source in a light blue 8000 — 12000K . Color temperature selection according to individual preferences, some people like to warm, then the color temperature of about 3000K lights on for him, like daylight people 5000K — 6500K color temperature of light can meet his requirements. Like the cool colors of the election 8000 — 12000K LED lights.
4, LED lamp life is the luminous flux of emitted light was 100%, after a period of use, the light emitting efficiency is decreased, the current dropped to 70% of the initial luminous flux, the number of hours of the lamp life, Select the number of hours lamp life course, the longer the better.
5, LED temperature rise, the General License 25 ℃ — 30 ℃, specific to the LED light heat sink temperature: ambient temperature plus temperature rise is permitted on the heat sink temperature. When the ambient temperature is 37 ℃, LED lamp heat sink temperature of 37 +30 = 67 ℃, if you exceed this temperature, the temperature rise permitted this lamp is substandard. LED lamp operating temperature is the enemy, of course, the smaller the better heating, indicating a high luminous efficiency of LED lights, LED lights in the selection of the same lamp power can be lit simultaneously for comparison. The other is the LED light heat sink temperature warming faster Description LED light thermal conductivity, high efficiency, low thermal resistance.
6, such as their conditional, it can also be used to measure the illumination LED illumination table, choose a level, all the LED lights are tested at this height, LED lights just lit measure illuminance, 30 minutes or 60 minutes after the then measuring illumination, constant or variable illumination light is preferably small, variation in the description of the lamp heat is not good, a large resistance, the chip temperature rises, the luminous efficiency drop caused illuminance becomes small, this light can not be used.
7, with the LED fluorescent tube lamp replacement time to note that the current domestic production of LED lamps are without heat sink, this LED lamp cooling condition is not good, ordinary 30-watt fluorescent lamp LED lamp length power is only 17 dig around the light emitting element is assembled with a small straw hat LED strip PCB printed circuit board via electronic potting glue in a transparent plastic tube. I believe that this LED lamp life may be less than the required number of hours of life, the best selection of LED lamps with radiator, using them more reliable, abroad with aluminum heat sink LED tube products. Believe will develop such domestic radiator with LED Tubes, to meet the various needs of users.
8, in addition to the above indicators, choose LED lights should be selected on the eyes no glare, soft lighting some, that the eye will not feel uncomfortable to see the light, it is best to have its milky lampshade LED lights emit light softer. LED lights in use switching power supply will not have any impact on light, light switch does not affect the number of life, which is the biggest difference with the fluorescent lamps, LED lights are also an advantage.