Comparison of energy consumption, life, etc.
Metal halide lamp luminous efficiency is 100 lumens / watt; luminous efficiency is greater than 90; life 10,000; color rendering index 90; color temperature 3000-10000
LED lamp luminous efficiency is 110 lumens / watt; luminous efficiency is greater than 90; life 50,000; color rendering index 90; color temperature full range
Principle of illumination
The metal halide lamp is a metal halide lamp, which is composed of a rectifier, a capacitor, a trigger and a metal halide lamp. The trigger generates a high-voltage and high-current current instantaneously, so that the halide element in the metal halide lamp is fully activated to emit light through the rectifier. Constant current is required to supply the constant current, and the capacitor has power compensation. Increase the power factor.
LED light-emitting diodes are solid-state semiconductor devices that convert electricity directly into light. The heart of the LED is a semiconductor wafer with one end attached to a road illumination, one end being the negative pole and the other end connected to the positive pole of the power supply, so that the entire wafer is encapsulated by epoxy. The semiconductor wafer consists of three parts, one part is a P-type semiconductor, in which the hole dominates, and the other end is an N-type semiconductor, where it is mainly electrons, and the middle is usually a quantum well of 1 to 5 cycles. When a current is applied to the wafer through the wire, electrons and holes are pushed into the vector sub-trap. In the quantum well, the electrons recombine with the holes, and then the energy is emitted in the form of photons. This is the principle of LED illumination. The wavelength of light, which is the color of light, is determined by the material that forms the P-N junction.
Metal halide lamps currently use metal halide lamps for most large-scale lighting. The power is 35W-2000W, which is used in landscapes, large factory buildings, night lighting, stadium lighting, road lighting, and bracket shop lighting.
Relatively the current range of the largest LED lights, the current lumens are improving, the scope of use is also increasing, the conventional lamp power is less than 350W. Used in commercial lighting, signboards, office lighting, commercial store lighting, road lighting, square lighting, etc.