Well,led downlight is a kind of light making the illuminance of the work-plane higher than the surroundings, which is mainly used in large-scale operation mine, building footprint, stadium, overpass, monument, park and parterre. So a well protection is needed for the outdoor use.
An important parameter of LED downlight to distinguish the level of protection is IP rating. IP rating represents Ingress Protection, which is established by IEC(International Electrotechnical Commission). The purpose of IP rating is to classify the anti-dust-and-moisture property of a electric appliance. IP rating is made up of two digit numbers which stand for different forms of environmental influence. To be specific, the first digit stands for the protection grade against ingress of dust or solid objects, while the second digit stands for the airtight degree against ingress of water or moisture. The larger the number is, the higher the protection is. The solid objects include tools and fingers which should not be allowed to touch the charged part of an electric appliance in case of electric shock.
As for the first digit, 0 to 6 represent different protection ranges. 0 means no protection, without special protection for human or objects outside of the electric appliance. 1 stands for the prevention against ingress of solid objects with a diameter over 50mm, preventing human body (e.g., palms) from touching inner components accidentally and ingress of objects with a large size. 2 represents the prevention against ingress of solid objects with a diameter over 12.5mm, preventing human's fingers from contacting inner components or ingress of objects with medium size. 3 indicates the prevention against ingress of solid objects with a diameter over 2.5mm, preventing ingress of tools, wires or similar small objects over 2.5mm diameters or thicknesses from touching inner components. 4 stands for the prevention against ingress of solid objects with a diameter 1.0mm, stopping ingress of tools, wires or similar small objects over 1.0mm diameters or thicknesses from touching inner components. 5 represents the prevention against ingress of solid objects or dust, which refers to a complete prevention against solid objects, or the amount of ingress of dust will not affect the normal operation of the electric appliance though ingress of dust can't be fully stopped . 6 also indicates the prevention against ingress of solid objects or dust, but without any ingress of solid objects or dust.
The second digit ranges from 0 to 8 with the detail explanation as follows. 0 is no protection, without special protection for water or moisture. 1 means the prevention against ingress of water drop, which implies vertically falling drips (e.g., condensed water) will not damage electric appliance. 2 stands for the prevention against ingress of water drop when tilting 15 degrees, specifically,when the electric appliance is tilting 15 degrees, drips will not do harm to it. 3 indicates the prevention against ingress of spraying of water, protecting against raining or preventing ingress of spraying of water, if the direction of the vertical angle is less than 60 degrees from the electric appliance, from destroying the the electric appliance. 4 means the prevention against ingress of splashing water, preventing water splashing from every direction from destroying the the electric appliance. 5 shows the prevention against ingress of water from the jet of water nozzle of any direction. 6 represents the prevention against invasion of big waves from ruining the electric appliance installed on the deck. 7 stands for the prevention of ingress of soaked water from destroying the electric appliance when it is dipped in water for a certain period of time or the water pressure is under a certain standard. 8 means the prevention against ingress of immersed water if the electric appliance is immersed in appointed water pressure for an infinite duration.
According to the IP rating, we should choose the proper LED downlight more serious.
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