What factors influencing the life of LED street light ?
According to our survey of customers, the main factors influencing the life of LED street lighting are as follows:
First, the protection grade is failure: a lot of LED street light light source cavity have water droplets, dismantling found that due to the long time use of outdoor environment, the original sealant yellowing and aging, less sticky, due to respiratory effects, water vapor in the light source cavity to form water.
In addition, the SMD lamp bead welding plate will short circuit caused by water vapor into, single light source short circuit caused a series of circuit breakers, causing part of lamp is broken, harmful gas into lead to the light source surface is colloid sulphur corrosion, colloid cracking caused wire breaking and then lamp bad.
Second, the insufficient cooling: survey found that most of LED street light used the radiator, heat dissipation area in order to save cost, hot and cold than beyond reasonable range, the light source to set aside the cooling allowance is not enough, cause work temperature is too high.
Third, the power supply: we found that most of the power supply exposed in the outdoors for a long time, no protection for power supply, a lot of manufacturers have a misunderstanding that IP67 protection grade can use directly exposed in the outdoor environment, actually IP67 test standard is The lamp is lighting under water 1 meters for 30 minutes.
Fourth, the light decline: choose a LED street light that used 3 years, measured ground illuminance and initial value difference 40% above, cause the factor of light to decline very many kinds.
First the light source the light failure, the reason is the attenuation of light chip itself, chip makers give the data of domestic chip resistance is125 °, import chip junction temperature is 145 °, ensure the chip under tolerance junction temperature theoretical service life of up to 50000 h.
Followed by the lens aging caused by the light transmittance is reduced, the survey found customers to use the LED street light product used the PC lens, erosion by ultraviolet (uv) and car exhaust in the outdoor environment, yellowing caused by aging affect the light transmittance, which reduces the luminous efficiency of lamps and lanterns.
In addition, we also found a lot of street lamp management tend to use low color temperature LED street light, found that after communicating, low color temperature of LED lights in the snow can improve the degree of identification of the scope of the road, more than 2200k to 6000k can make people feel comfortable, before the main application of low pressure sodium lamp and high pressure sodium lamp.
Because LED street light shows high can raise object identification, general can improve road traffic safety.
First, the protection grade is failure: a lot of LED street light light source cavity have water droplets, dismantling found that due to the long time use of outdoor environment, the original sealant yellowing and aging, less sticky, due to respiratory effects, water vapor in the light source cavity to form water.
In addition, the SMD lamp bead welding plate will short circuit caused by water vapor into, single light source short circuit caused a series of circuit breakers, causing part of lamp is broken, harmful gas into lead to the light source surface is colloid sulphur corrosion, colloid cracking caused wire breaking and then lamp bad.
Second, the insufficient cooling: survey found that most of LED street light used the radiator, heat dissipation area in order to save cost, hot and cold than beyond reasonable range, the light source to set aside the cooling allowance is not enough, cause work temperature is too high.
Third, the power supply: we found that most of the power supply exposed in the outdoors for a long time, no protection for power supply, a lot of manufacturers have a misunderstanding that IP67 protection grade can use directly exposed in the outdoor environment, actually IP67 test standard is The lamp is lighting under water 1 meters for 30 minutes.
Fourth, the light decline: choose a LED street light that used 3 years, measured ground illuminance and initial value difference 40% above, cause the factor of light to decline very many kinds.
First the light source the light failure, the reason is the attenuation of light chip itself, chip makers give the data of domestic chip resistance is125 °, import chip junction temperature is 145 °, ensure the chip under tolerance junction temperature theoretical service life of up to 50000 h.
Followed by the lens aging caused by the light transmittance is reduced, the survey found customers to use the LED street light product used the PC lens, erosion by ultraviolet (uv) and car exhaust in the outdoor environment, yellowing caused by aging affect the light transmittance, which reduces the luminous efficiency of lamps and lanterns.
In addition, we also found a lot of street lamp management tend to use low color temperature LED street light, found that after communicating, low color temperature of LED lights in the snow can improve the degree of identification of the scope of the road, more than 2200k to 6000k can make people feel comfortable, before the main application of low pressure sodium lamp and high pressure sodium lamp.
Because LED street light shows high can raise object identification, general can improve road traffic safety.
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