How to choose the appropriate lamps and lanterns often pay attention to the basic parameters of the lamps, so we should have a clear understanding of the basic parameters of industrial lighting fixtures. The following is to share six key knowledge about industrial lighting for you to learn and Xi:
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1. Luminous flux (lm)
What is Luminous Flux?
Luminous flux is the sum of the amount of light emitted by the luminaire. The energy that a light source radiates into the surrounding space per unit of time and causes the human eye to perceive light
Luminous flux unit: lumens, i.e. lm. This quantity is a description of the total amount of light emitted by the light source, which is equivalent to the optical power.
The higher the luminous flux of a light source, the more light it emits.
Luminous flux calculations
The unit of luminous flux is "lumens". Luminous flux is usually expressed in medium, and its unit is theoretically equivalent to the electrical unit watt, because vision is still related to light color. Therefore, according to the standard light source and the normal visual power measurement unit, "lumens" is used, and the symbol: Im.
The actual luminous flux of the lamp (luminaire lumens) / (luminous flux of a single light source * number of light sources), the shallower point is the actual luminous flux emitted by the luminous flux of the lamp divided by the luminous flux that the luminous luminous luminaire should emit.
FOR EXAMPLE, THE LAMP HAS FIVE 1W HIGH-POWER LIGHT SOURCES, AND THE LUMINOUS FLUX OF A SINGLE HIGH-POWER LIGHT SOURCE IS 80LM, AND THE WHOLE LAMP SHOULD EMIT 80LM*5PCS=400LM. However, when assembled into a lamp, the actual luminous flux of the lamp is only 350LM. This is the luminous efficiency. Then the luminous effect of this lamp is 350LM/400LM=87.5%
2. Luminous intensity (cd)
Luminous intensity refers to the luminous flux emitted by a light source in a solid angle in a specified direction, referred to as light intensity, and the SI unit is Candela (Candela) abbreviated CD. When the light source radiation is uniform, the light intensity is 1=F/Ω, the Ω is the solid angle, the unit is sphericity (sr), F is the luminous flux, the unit is lumens, and for the point light source, it is I=F/4.
3. Light source efficiency (lm/W)
It indicates the number of lumens that can be emitted by a light source for every watt of electrical energy consumed, which is the light effect. Luminous efficiency is an important indicator to measure the luminous efficiency of a light source.
Fourth, illumination
The luminous flux of a luminous body on a unit area of the illuminated object, in lux (Lux or Lx). The magnitude of illuminance is related to the luminous intensity of the light source. The greater the luminous intensity of the light source, the higher the illumination. If the luminous intensity of the light source does not change, the closer the light source is to the subject, the higher the illumination of the subject. Illuminance is inversely proportional to the square of the distance. This rule applies to point light sources that emit uniform light.
5. Brightness (cd/m2)
The luminous intensity of the luminous body per unit area in the direction of the line of sight. Calculation formula: Since the visual sensation formed by the imaging of a luminous object on the retina is directly proportional to the illuminance of the object image on the retina, the greater the illumination of the object image, the brighter we feel; The illumination of the image is inversely proportional to the projection area of the luminaire in the direction of the line of sight, and directly proportional to the luminous intensity of the luminaire in the direction of the gaze. Of all the light measurements, brightness is the only one that directly induces visual sensation to the eye.
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6. Color temperature (K)
When the color of the light emitted by a light source is the same as the color of the standard blackbody at a certain temperature, we call the absolute temperature of the black body at that time the color temperature of the light source is the color temperature of the light source, which is expressed as the absolute temperature K. The lower the value, the more warm yellow it is; The higher the value, the more blue the light will be.
Warm white light: The color temperature is below . The warm light is similar to the incandescent light color (K), and the red component is more, giving people a warm, healthy and comfortable feeling, which is suitable for families, residences, dormitories, hospitals, hotels and other places, or places with relatively low temperatures.
Medium white light: Its color temperature is between K and K. The warm white light is soft and soft, making people feel pleasant, comfortable and serene, suitable for shops, hospitals, offices, restaurants, waiting rooms and other places.
Cool white light: also known as fluorescent lamp, its color temperature is above K, and the light source is close to natural light. It has a bright feeling and makes people concentrate, and is suitable for offices, conference rooms, classrooms, drawing rooms, design rooms, library reading rooms, exhibition windows, etc.
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Purchasing LED lights for both residential and commercial applications is very different than purchasing traditional lighting was eight years ago. Before you go shopping here is 5 things to look out for before you purchase.
Not all numbers are created equal. Forget what you think you know regarding wattage. When shopping for correct bulb or fixture, you must first understand what the meaning of wattage and lumen is. Wattage or watts is a measurement on how much energy a light is using, not the brightness of the light. Lumen's simple meaning is the measurement of brightness from a light source. In traditional lighting there was a direct correlation between watts and brightness. For example, a 75w light bulb produces more lumens than a 60w bulb. LED lighting is not so simple. A Light-emitting diode or LED has a larger range of efficiency, some lights produce more lumens per watt(L/W). For example, an 8w LED bulb can produce more lumens than a 12w LED bulb pending on manufacture and specification. Using this example, someone purchasing the 8w bulb will save the shopper more energy during the bulb's lifespan than the 12w bulb while producing the same brightness. So, when shopping for a light product forget what you thought you knew and pay attention to efficiency of brightness, not wattage.
Light Color Temperature:
You like what you like. Color Temperature does not mean brighter even if it seems that way. LED lighting temperature is based on the kelvin measurement system. A warm temperature is usually k or less, cool white is usually around k, and bright white or daylight is around k. Warm white will produce a more yellow look while bright white will have a more whitish blue look to it. Simply put the lower the kelvin the more yellow, the higher the kelvin the whiter/blue it will be. But what is the right choice? Which is brighter? The answer to both is D none of the above. Everyone interprets temperature differently, some think a k looks brighter than a k. The temperature does not change the brightness of light, just the appearance of brightness per the individual. While shopping for a light product think of the following. Where is the light being used? What is the light being used for? What is the objective of the light? Remember, there is no wrong answer to color temperature. To each their own.
LED Price
You're not always getting more bang for buck, know before you spend the cash. LED lighting has dropped in price about 50% in the last 5 years. But what is the difference? The market is flooded with different manufactures and pricing all claiming to the best. Things a consumer should be mindful of. Warranty, manufactures play a tricky game on LED products. For example, a LED product will claim to have a 5-year 50,000-hour operating life warranty. If you read the fine print this means they will warranty the product for 5 years or 50,000 hours witch ever comes first. So, a product with a 7-year 50,000-hour operating life warranty will cost more, but it essentially holds the same warranty. Paying more for a name brand doesn't always mean a better product. Just the other day I visited my local pharmacy to buy a bottle of ibuprofen for my aging back. I was presented with two options, buy the name brand or the pharmacy brand. After reading each box carefully I realized there was no difference besides the price tag. The is most likely because they are made on the same manufacturing line from the same pharmaceutical company. Lighting is no different. So before spending your hard-earned dollar read the fine print, and buying a name doesn't always mean better or different.
Not all LED's are dimmable. The old dimming switch might not work either. When buying a LED do not assume it will be a plug and play application. Unlike traditional lighting there are some LED lights that are not capable of dimming. Incandescent bulbs work by running electric current through a wire filament, a dimmer switch lowers the current to the wire filament to dim. LED's are not dimmed or brighten with the increase or decrease of current. LED light emitt's from a semiconductor chip, so its either all on or off. The LED is always using the same current. Instead LED's create a dimming effect in two different ways, pulse-width-modulation (PWM LED) and analog dimming. The product specification or box will specify if the LED is dimmable or not. If your buying and wish to dim, make sure you verify before purchase. The same applies to dimming switches or controls on your property. Most likely the current measures installed are made to adjust current and will not dim LED lighting. When your shopping you want to make sure pick up a switch or control device the capable of dimming LED lights by means of PWM, analog, or both.
A cost-effective lamp or bulb might not be the best solution for your property or residents. When deciding between a fixture or lamp replacement one must consider some key points. Not all lamps will work in old fixtures. LED lights worst enemy is heat. If the fixture is enclosed and the LED product doesn't have the correct heat syce technology the product will most likely fail before its expected life span. After replacing the lamp, one might spend more than they would have with a new fixture. What are the local utilities companies offering for incentives? There a different incentive offered in different areas. In most areas the extra incentives will offset the cost of new product. For example, you could pay $5.00 for a lamp with a $2.00 dollar incentive or pay $15.00 dollars for a new fixture with a $12.00 incentive. The net cost remains the same, but you gain the cosmetic appeal of beautiful new fixture. The last thing to consider is installation. If you are doing itself or paying an electrician this has a large effect on the time and cost for a fished replacement. Each situation should be evaluated different. How much time would it take to replace the fixture vs lamp? How much with the installation affect the overall cost or time? When combined selecting the right product that last the longest, capitalizes on the most incentives offered, and spends the lowest time or money for installation will be the best choice for any application.