Which lamp bead is better for LED tubes?
1. 3528 patch:
1. Introduction to 3528:
3528 single lamp bead is 0.06W, the most common brightness used to make fluorescent lamps is 7-8LM, and some may be 6-7LM.
2. Analysis of advantages and disadvantages:
(1) Spot: The thickness of 3528 is 1.8mm, which is mainly for point light. It is easier to produce spot when made into fluorescent lamp.
(2) Heat dissipation: The heat dissipation performance of the 3528 patch is poor, and there is a layer of plastic between the bottom heat sink and the chip, so the heat dissipation performance is poor. The number of lamp beads used to make LED fluorescent tubes is large, so the heat dissipation performance of the whole lamp and also
It is poor, which is very harmful to the life of the led tube.
(3) Lamp cost: It is more expensive to make LED fluorescent tubes. A 18W LED fluorescent tube uses 3528 and requires 288 LEDs. The brightness of the whole lamp is: 288 LEDs*7.5LM*0.9 (power efficiency)*0.85 (transparent) Light rate
)=1652.4LM (brightness of the whole lamp); low-quantity and low-priced lamp beads may be used if quality is not considered, for example: using 288 6-7LM 3528, the overall cost will drop a lot: but the brightness will also drop a lot of:
The brightness of the whole lamp is around 1380LM
2: 3014 patch
1. Introduction of 3014:
The 3014 single lamp bead is 0.1W, and the general chip size is 10*23nm. The most common brightness for LED fluorescent lamps is 10-12LM.
2. Analysis of advantages and disadvantages
(1) The 3014 adopts a vertical package structure with thermoelectric separation. The chip and the heat sink are directly connected, which improves the heat dissipation performance, so that it can withstand higher current (30ma) and the brightness is also improved.
(2) The thickness of 3014 is only 0.8mm, which can solve the problem of light spots on the side of 3528, but the light-emitting area of 3014 is small, the light output rate is 85-88%, and the brightness of the whole lamp can be improved.
(3) Cost: The cost of 3014 is relatively lower. Taking 18W as an example, with 176 pieces of 3014, the brightness of the whole lamp is about 1600LM).
Three: 2835 patch
1. Introduction to 2835:
2835 single lamp beads have 0.12W 14-16LM and 0.2W 22-24LM, both of which are suitable for LED fluorescent tubes.
2. Analysis of advantages and disadvantages:
(1) The 2835 lamp bead uses a vertical packaging structure: the chip is directly connected to the heat sink, and the area of the heat sink is about twice that of 3014, which further improves the heat dissipation performance of the lamp bead itself, so that it can withstand greater current
40-60mA), the brightness is also higher, and the excellent heat dissipation performance design is also more guarantee for the light decay and life of the LED chip;
(2) Ultra-thin structure: The thickness of 2835 is also 0.8mm, which can solve the spot problem of 3528; super large luminous surface: can increase the light output rate: up to 90%.
(3) Cost: Take 18W as an example:
1. If you choose to use 0.12W 14-16LM 2835, the brightness of the whole lamp is: 144*15LM (the middle value of the brightness of a single lamp bead)*0.9(power efficiency)*0.9(light output rate)=1749LM( The whole light is on
The degree is around 1749LM).
2. 1. Choose 2835 with 0.2W 22-24LM. The 18W LED fluorescent lamp needs 100 lamp beads. The cost of the light source is: 100 pcs * 0.19 yuan/cap = 19 yuan, and the brightness of the whole lamp is: 100 Grain*22LM (single
The middle value of the brightness of the lamp beads) * 0.9 (power efficiency) * 0.9 (light output rate) = 1782LM (the brightness of the whole lamp is around 1782LM).
