Please note: 220V economical model is
Non -isolation constant current driver
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Iron bracket LED light beads
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Products running volume.Low price and high cost performance, welcome to buy!
Detailed explanation of the quality of LED corn lamps:
1: LED light beads,
Please prepare a small magnet and test whether the lamp beads are magnetically absorbed. If they are magnetically absorbed, it is a inferior LED. The price of a single piece is about 1 minute. Please do not buy this kind of thing, and the lifespan is generally about half a year.If the lamp beads that do not absorb magnetism are at least the lamp beads of aluminum or ceramic fiber support, their lifespan will be more than one year.
2: Drive power supply. There are roughly three types of corn lamp driver power supply on the market:
1. Dissolvation resistance power supply,
It consists of diodes, electrolytics, and CBB capacitors, which is cheap. First: the screen flashes severely, the mobile phone camera is close to the light, and the screen will have obvious stripes of light and dark alternating light and dark. Second: poor safety, and electricity may leak when installing the light. Pay attention to turning off the power switch during installation to ensure safety. Third: the starting voltage range is narrow. If the voltage is lower than 220V and higher than 220V, the LED will obviously dim and brighten!Fourth: The whole lamp of the resistive and dissolving power supply is a series circuit. The exposed LED voltage is very high, and it is easy to be electrocuted when touched. The current impact is very large when turning on the lamp, which can easily destroy the LED lamp beads, causing the entire lamp or group to not be on!
2. Non-isolated constant current power supply:
Constant current is not constant voltage, and the cost is low, which is similar to the cost of resisting and dissolution. Large wattage corn lamps are even a little lower than the cost of resisting and dissolution. More than 98% of merchants online use non-isolated constant current power supplies.Characteristics 1: The starting voltage range is narrow, small wattage (small number of lamp beads) can be 120-240V, and large wattage (more number of lamp beads) can only be 180-240V, poor stability is not desirable. Characteristics 2: No strobe or slight screen flash, which misleads consumers and says that we are a constant current power supply!Characteristics 3: The safety is also poor. There may be electricity leakage when installing the lamp. Pay attention to turning off the power switch to ensure safety. The output voltage is determined by the number of strings of the lamp beads. For example, the number of LED strings is 30 strings, and the exposed voltage is 90V!You dare to touch it with confidence
Lights?Although non-isolated power supplies have ICs and transformers, the current impact is very large when the light is turned on, which can easily burn out the LED lamp beads. Speaking of this, some merchants have fooled it again: we have a fully parallel circuit, and destroying one lamp bead will not affect other lamp beads, and it is both video and pictures and text.Cutting off one of the full parallel circuits by yourself does not affect other lamp beads!However, if the non-isolated constant current power supply impact burns the lamp beads, then the burning will definitely not be one, but a group of LEDs that may even burn out the entire lamp!Seeing this, dear, do you still dare to buy such a cheap non-isolated corn lamp?
3. Isolated constant current drive power supply:
Constant current and constant voltage, DC output has high safety, high cost, high luminous efficiency, good durability, long life, wide voltage starting range, full voltage AC85-265V!
Seeing this, many consumers can’t help but ask, how to distinguish between good-quality isolation and inferior non-isolation?It's very simple: From the appearance, the shape of a non-isolated power supply is much smaller than that of an isolated power supply with the same tile, because the non-isolated structure has fewer electronic components, and you can also query from the IC. Each power supply has the IC manufacturer's string number and code. You can directly enter the IC manufacturer's string number and code in Baidu to check whether it is a non-isolated power supply.
5730 patch series: (Single chip 50-55LM high-gloss chip, pay attention to maintaining a ventilation environment, and strictly prohibit the use of sealed use. The shell is deformed, yellowed and burned, and the 2-year warranty is not within the 2-year warranty)
About warranty:
We have 2 years warranty, 7 days without reason to return and exchange, we are responsible for round-trip shipping costs within 90 days, and each freight is responsible for the shipping costs issued during the warranty period after 90 days, and the maintenance is free.This product is a plastic shell lamp body + aluminum substrate. Do not use it in sealed or covered. If the appearance of the lamp bulb is deformed due to sealed or covered, it does not fall within the warranty scope.
about delivery:
Except for some regions (Taiwan, Macao, Xinjiang, Tibet, no free shipping overseas),
Most of the mainland Chinese
land
Free shipping in the area
, anyone who meets the free shipping area can shop by yourself.Free shipping default
Yunda Express, please do not note other express delivery, as the note is invalid.
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