A led lamp with a dedicated power to bring a few lights
Second, the current market for some easy to burn the lamp beads
1, some manufacturers themselves are cottage factory, no engineering and technical personnel. Just buy other manufacturers to bring back the copy of the lights, and other manufacturers on the lamp with the current limiting resistor is how much, according to how much of the current limiting resistor. Do not know LED chips each batch of current are not the same, each batch should be based on the actual LED chip current limiting current limiting resistor. So that current limiting current limit is not enough, it led to some light belt easy to burn out of the situation.
2, the use of light with the customer is not clear the actual power of each light band, chaos with power, and the lights are often in a bright state, power supply is insufficient, eventually leading to light burned.
3, another reason: some power manufacturers to deceive consumers: the use of copper clad aluminum transformer, because the cooling effect of aluminum than copper transformer is poor, in the power, the power may be a time to achieve, but the power of a long time, power It can not afford the power of the lamp, it will burn the lamp, or burn the power.
Know the exact power of LED lights on the best, your power is 24 * 4.2 = 100.8W, the 100.8W in addition to the light of the power per meter can, if I do not know, look at the following:
One, the same circuit with LED lights, but the power and LED quality is different Why?
1, LED lights with the first launch, because the price space is relatively large, light manufacturers are using high current consistency, high brightness LED chip, this type of chip current is: 0.02A;
Later, due to the price of light bulb market competition, many lights with manufacturers to use the brightness is not high, the current is not consistent with the LED chip, this type of LED chip current is: 0.011A.
2, then we use the most commonly used 5050 lamp beads, for example, first calculate the power of a lamp beads:
If it is good quality LED chip: a single chip current of 0.02A, then a lamp current of 0.02A × 3 = 0.06A.
If it is poor quality LED chip: a single chip current of 0.011A, then a lamp beads current 0.011A × 3 = 0.033A.
3, now we come to calculate the power of three for a group
Good quality chip: 12V × 0.06A = 0.72W, 1 meter lamp with 60 lamp beads composed of 20 groups, 1 meter power 0.72W * 20 = 14.4W
Poor quality of the chip: 12V × 0.033A = 0.396W, 1 meter lamp with 60 lamp beads composed of 20 groups, 1 meter power 0.396W * 20 = 7.92W
Third, the virtual standard power drill LED lights with different power of the loopholes:
Customers in the purchase of the use of light, according to the previous habit when the 14.4W / m: If you want to bring light with 30 meters, the power will be 30 meters light with 14.4W = 432W, customers will use 450W power supply, but As the market is a lot of 7.92W / m light belt, 30 meters is 30 * 7.92 = 237.6W, the production of virtual power supply manufacturers to seize this point, the 240W power supply virtual standard 450W. So the actual user is to use 450W power supply price to buy
Buy the actual power supply is 240W.
For example: 450W virtual power supply is 80 to 85 yuan / Taiwan, RC full power 240W is 73 yuan / Taiwan, in fact RC power supply high reliability, higher load, the price is more affordable.
Four, warm tips:
1, compared to the merits of power supply can not only compare the number of W marked by the power supply, depending on the actual load power supply; electronic material selection; transformer whether the aluminum transformer.
2, the proposed customer knowledge of the lamp with a certain understanding, you can configure their own test tools to detect the actual power of each batch of lights, matching more economical, real power.
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