The G4 in the crystal lamp beads represents the model and specifications of the lamp.

Specifications: Use two or more pins. The distance between the center points of the lamp holder is four centimeters. G4 specifications are widely used in crystal lamps, wall lamps and spotlights. The largest market share is G4, which emits light through tungsten filament.

Meaning: G represents the type of bulb pin, which is two or more. 4 represents the distance between the centers of the two pins.

Extended information:

Features:

1. Voltage: LED lamp beads use low-voltage power supply, and the supply voltage is between 2-4V, depending on the product. Different, so it is driven by a safer power supply than high-voltage power supply, especially suitable for public places;

2. Current: The operating current is 0-15mA, and the brightness increases with the increase of the current. Brighten

3. Efficiency: Energy consumption is reduced by 80% compared to incandescent lamps with the same light efficiency.

4. Applicability: Very small, each unit LED chip is 3-5mm square, so it can be prepared into devices of various

shapes, and is suitable for variable environment.

6. Response time: The response time of incandescent lamps is milliseconds, and the response time of LED lamps is nanoseconds.

7. Environmental pollution: no harmful metal mercury.

8. Color: Changing the current can change color. Light-emitting diodes can easily adjust the energy band structure and band gap of the material through chemical modification methods to achieve multi-color emission of red, yellow, green, blue and orange. For example, an LED that is red when the current is small can turn orange, yellow, and finally green as the current increases.

Baidu Encyclopedia-LED lamp beads