With the advancement of technology, many people will replace traditional light bulbs with LED light bulbs in their homes. Generally speaking, everyone thinks that LED light bulbs are more durable than traditional light bulbs, but their lifespan is always limited, and you cannot expect them to last forever. Today, let us learn about LED light bulbs together, and tell you what the values on the packaging box mean when you buy LED light bulbs.
Of course, there will be big selling points marked on the front of the package, such as lifespan, power consumption, etc., but you can see more detailed specifications and values about this LED bulb when you turn it to the side, so what do they represent? Let's "look at the picture and tell the story" together. First of all, I will show you a sample picture of the specifications of LED bulbs that happen to be in my home:
Next, let's explain a few values that should be paid special attention to:
power consumption
Simply put, it is the power consumption of the light bulb. The higher the wattage, the more power the light bulb consumes.
color temperature/color temperature
Color temperature refers to the hue of the light, and the unit is K. The higher the value, the cooler the color of the light emitted; the lower the value, the warmer the color of the light source. Generally speaking, the color temperature of 6500K is white light, which is suitable for bright spaces that need to cheer up; 4000K is natural light, the light is bright but soft, and is most suitable for general environments; 3000K is yellow light, suitable for relaxing and warm scenes.
Luminous flux <<< depends on whether it is bright or not
Luminous flux refers to the visible light that the bulb can emit, that is, the brightness of the bulb, in lumens (LM). The higher the value, the higher the brightness of the bulb, and vice versa. But this also needs to take into account that the location of your installation is different from the type of lighting fixtures, which may make the bulbs with the same luminous flux have different brightness perceptions.
Luminous Efficiency <<< Save electricity and watch this
Luminous efficiency represents the efficiency with which the light source converts the consumed electrical energy into light. It is expressed by the ratio of luminous flux to electrical power consumption. The unit used is LM/W. Generally speaking, the higher the value of the luminous efficiency, the more efficient it can be. Using electricity means saving more electricity. So if the light bulb box you want to buy does not list this item, you can directly divide the luminous flux by the power consumption to estimate it.
Color rendering
If it is English, it is usually written as "CRI" or "Ra", which represents the color effect of objects under the light. It is generally believed that the closer to the real appearance of objects under sunlight, the better the color rendering. Sunlight is marked as 100, which is the indicator of the highest color rendering. CIE (International Commission on Illumination) recommends that Ra ≧ 80 be used as a benchmark for offices and homes. In theory, the closer to 100, the better. However, it is difficult to buy bulbs with a color rendering greater than 90 on the market, and the price is very high.
Lifespan corresponds to beam maintenance rate <<< See this for durability
This item indicates the percentage by which the lamp brightness is reduced to that of a new lamp after the specified lifetime. For example, L70 in the specification above means that after a rated life of 4,000 hours, the brightness of the bulb will drop to 70% of that of a new bulb. You can also buy higher grade (and more expensive) bulbs, up to L90, or even >L90.
