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 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
• 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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