The Difference between LED Light Cold and Heat light source

Time:2017/2/9  keywords:LED Light, LED Street Light

Have you ever heard LED Light cold and heat light source up to now or how much do you know about them? Now, let’s talk about the difference between them.

LED Street Light.jpgCold light source is a kind of light source which is stimulated by chemical energy, electric energy or biological energy, such as firefly, neon light, LED Light, etc. It has very excellent specialty of optics and flicker. When an object gives out light and its temperature is not higher than environmental temperature, it is named as cold light source. For example, LED takes advantage of electron hole pair to compound light. Strictly speaking, even though LED (lighting emitting diode) also releases heat during glow, it is far lower than incandescent and other light source. The experimental data shows that the conversion efficiency between LED electricity and light is about 30%, and the efficiency of internal quantum is about 70% while external quantum is about 50%.

On the contrary, heat light source is a kind of light source which is stimulated by heat energy. For example, incandescent gives out light by heat radiation when the temperature is between 3000 and 4000K, and about 80%-90% energy is converted into heat energy, while only 10% energy is converted into light energy. This is the reason why the luminous efficiency is a little low. It’s no doubt that it cannot be defined as cold or heat light source only based on the temperature of the fixture shell, which is only to judge the quality of the heat dissipation of fixture.

Actually, cold light source doesn’t mean glow without heat energy. It means that the glow method is not to covert heat energy into light energy. Incandescent is a typical case that converts electricity energy into heat energy and then converts heat energy into light energy. Therefore, its heat energy losses a lot while the luminous efficiency is low. So far, more and more street light has been updated into  LED Street Light   . According to this development trend, the times that cold light source has completely replaced heat light source is not so far because LED Light could be regarded as cold light source. 


Sports Light & Flood light
    NEW Edge™ Glare-free Tennis Court Light
    NEW Edge™ 180LPW Sport & Flood Lighting
    NEW Edge™ 160LPW Sport & Flood Lighting
    LitePro™ 140LPW Sport & Flood Lighting
Roadway Lighting
    Phantom™ Cobra Head Street Light
    Icon™ Tool-free Street Light
    Oasis™ 160LPW Street Light
    NEW Edge™ 180LPW Modular Street Light
High Bays for 80°C/176°F Ambient Temp
    NEW Edge™ 175LPW 80°C High Bay
    Edge™ 130LPW 80°C High Bay
Engineering & Heary-duty Lighting
    LED Victor™ Light
    LED Victor™ With Emergency Power Pack
    Hercu™ LED Bulk Head
Area Lighting & High Mast Lighting
    Orion™ 150LPW Shoebox Light
    Spider™ Garden Light
    NEW Edge™ 180LPW Area Light
    NEW Edge™ 160LPW Area Light
    NEW Edge™ 180LPW High Mast Light
    NEW Edge™ 160LPW High Mast Light
High Bays for General Uses
    Grapheneism™ 140LPW UFO High Bay
    LitePro™ Linea High Bay for High Rack Warehouses
    Apollo™ 170LPW High Bay
    LitePro™ High Power High Bay
    NEW Edge™ 180LPW High Bay
Wall Pack
    LitePro™ Adjustable Modular Wall Pack
    Diamond™ Die Cast Wall Pack
Canopy Lighting
    Stella™ LED Canopy Light
Tri - Proof Linear Luminaire
    Luna™ regular Tri - Proof Linear
    Luna™ Deep Dimming Tri - Proof Luminaire with Switchable CCT
System Introduction
    System Introduction