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HID Bulb vs LED Bulb-difference between HID and LED Bulbs

This page compares HID Bulb vs LED Bulb and mentions difference between HID and LED bulbs.

Light bulbs are available based on LED, HID, LCD, incandescent etc.

HID Bulb

HID Bulb working

• HID stands for High Intensity Discharge. It generates light when electric current is passed between two electrodes and ionized gas.
• Electrodes and gas are enclosed inside quartz glass capsule.
• Light radiation occurs from arc when charged electrons interact with gas and changes the orbit.
• HID uses extra gas such as sodium, metal halide and mercury.
• It requires ballast in order to regulate power and to create electricity surge initially. This allows light to start. The figure-1 depicts working of HID bulb or lamp of mercury type.
• It produces higher illumination at less power.

LED Bulb

GE link smart LED bulb kit

• LED stands for Light Emitting Diode.
• LED is a semiconductor which consists of positive and negative charge parts known as anode and cathode.
• It creates light by exciting electrons.
• When LED light is powered ON, electricity passes through the semiconductor. Due to this electrons get charged and start to flow from negative (i.e. cathode) to positive (i.e. anode) layer within the device. The flow of electrons through the holes emit photons of light. This causes LED bulb to illuminate.
• The figure-2 depicts zigbee based smart LED bulb from GE.

Refer advantages and disadvantages of LED bulb>>.


Features HID Bulb LED Bulb
Life time Lower, about 15000 to 25000 hours Higher, about 50000+ hours
Durability Fragile Heavy duty
Performance requires about 5 to 10 minutes warmup time Turns ON immediately without any flickering
Direction of light output Creates light in all the directions Creates focused as well as omni-directional light output
Color temperature few options are available multiple options are available
Dimmable No Most of them are dimmable.
Cost Lower Higher
Warranty lower, usually about 1 to 2 years higher, usually about 5 years


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