How to choose LED lighting correctly!
The application of LED lights is becoming more and more extensive. What should we pay attention to in the process of using LED lighting? For consumers, how can we choose the right lighting fixtures? This article will introduce them one by one. Power selection: LED bulb, professionally called LED bulb, its most common household power is 3W, 5W, 7W, 9W, engineering 12W, 18W, 21W, 24W, or even a larger power, 40W, 80W, 120W, 150W, etc.
1. There are six parameters to roughly judge the quality of LED:
1. The unit of luminous flux (Φ) is lumens (lm)
2. The unit of color temperature (k) is Kelvin
3. Color rendering (ra) color rendering index
4. Light source efficiency (lm∕w)
5. The power factor of the power supply
6. Cooling effect
Need to meet these six parameters of the lamp, basically can determine the quality of a lamp!
2. Power selection
LED bulb, professionally called LED bulb, its most common household power is 3W, 5W, 7W, 9W, engineering uses 12W, 18W, 21W, 24W, or even larger power, 40W, 80W, 120W , 150W, etc.
3W bulbs are generally used in table lamps and bedside lamps.
5W bulbs are generally used on floor lamps.
7W bulbs are generally used in garages, nanny rooms, etc.
Personal suggestion: Like the large chandelier in the living room, it generally uses 3W, because it may use 6-30 light bulbs on one lamp, and the number of light sources determines its brightness. Like table lamps\floor lamps, the construction idea is based on power. bigger bulb,
3. Lamp head selection
There are bayonet and screw sockets for the lamp holder. Commonly used lamp holders are E27, E14, E26, etc., which are all screw sockets. The letter E represents the Edison thread screw lamp holder or lamp holder, and the number behind represents the outer thread of the lamp holder. Integer value of diameter in mm.
Therefore, E27 means a screw base with an outer diameter of 27mm, and E14 means a screw base with an outer diameter of 14mm. The power of the LED lamp has nothing to do with the size of the base. The same power LED bulb can use either the E27 base or the E27 base. E14 lamp head, of which E27 is the most commonly used lamp head.
There is also a B22 lamp holder. B22 lamp holder is a kind of lamp holder. The lamp holder refers to the interface connected to the end of the electric light wire for installing the bulb. It is the part of the lamp that fixes the lamp on the lamp holder and connects the lamp to the power supply.
Electric light sources mainly use the lamp holder and lamp holder naming method. The meaning of the relevant symbols is: B bayonet lamp holder, the number behind B indicates the diameter of the shell, such as: B22D/25×26-- refers to the bayonet lamp holder with two contacts and a diameter of about 22mm; the total length is about 25mm, The skirt diameter is about 26mm.
4. Summary of parameters
In fact, no matter what kind of LED light you buy, you don’t really look at the appearance, but the heart inside. Just looking at it is not enough. The factory needs to use the spectral analysis system to measure the corresponding test report. There are at least five parameters on the report. We can go to In comparison, the heat dissipation parameters depend on the aluminum shell, and the light decay cannot be seen with the naked eye, and it needs a professional instrument to measure it.
5. Price Analysis
For example: a light bulb can be divided into: chip, aluminum substrate, shell, power supply, these parts. Each part has different brands, different batches, different prices. Equivalent to a free combination. If every part is used well, the price is very high, otherwise the price is very low; if some parts are used well, and some are used poorly, the price is moderate.
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