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"What Is Lumen Count" Was posted on June 28, 2019

Lumen Count The Most Important LED Specification

  • Brightness
  • Estimated yearly energy costs
  • Life
  • Light appearance
  • Energy used

What is Lumen Count? This is the most important piece of information you can read if you are looking to replace and existing metal halide lamp, high pressure lamp, incandescent lamp or halogen lamp. While all of these factors play a role in the abilities of the light bulbs, the brightness factor is by far the most important factor. When we say brightness, it is referring to lumens. What do we mean by lumens? Here are some facts to know.

  • Lumens refer to how much light the bulb puts out.
  • Since a lumen is a unit of measurement, it makes sense that the higher the lumens, the brighter the bulb.
  • When considering lumens, you should consider the amount of light needed for your space. It depends on the space you need to light. Brighter is not always better and can create a blinding effect in a space too small for the lumens.
  • A light bulb for a workstation is recommended to be around 50 lumens per square feet while a living room setting of approximately 250 feet will need around 5000 lumens. It is important to note that this doesn’t mean you need only one light source to meet this lumen output. You could have a primary light source with 3000 lumens and a secondary with 2000 lumens lighting the room for a total lumen count of 5000.

It’s All About Lumen Not Wattage

When it comes to and kind of LED light bulbs, shop for lumen and not wattage. While the old way of shopping was based on wattage as the deciding factor, it is smarter to shop for lumens because you are buying the amount of brightness you need for your space. Here are a few general rules for this aspect of choosing lighting provided by the US Department of Energy. When you are looking to replace higher wattage metal halide lamps or high pressure lamps you will need to up the lumen count accordingly.

  • To replace a 100 watt (W) incandescent bulb, look for a bulb that gives you about 1600 lumens. If you want something dimmer, go for fewer lumens; if you prefer brighter light, look for more lumens.
  • Replace a 75W bulb with an energy-saving bulb that gives you about 1100 lumens
  • Replace a 60W bulb with an energy-saving bulb that gives you about 800 lumens
  • Replace a 40W bulb with an energy-saving bulb that gives you about 450 lumens
  • To replace a 400W metal halide lamp you will need a minimum of 100W depending upon the lumen count of the LED lamp. One lamp may be rated at 100 lumen per watt while another may be rated at 150 lumen per watt.

When it comes to light bulbs, shop for lumen and not wattage. While the old way of shopping was based on wattage as the deciding factor, it is smarter to shop for lumens because you are buying the amount of brightness you need for your space. Aside from brightness or lumen output, the other factors play their part in achieving a great lighting solution.

You Can Save Up To 80% In Energy

  • The estimated yearly cost will help you determine the effects of your utility bill based on a set of varying factors and suggested daily usage.
  • The lifespan will take the calculated usage suggested and multiply it to tell consumers how many years the light bulb can be expected to last.
  • Light appearance is the color temperature in terms of warm or cool.
  • Finally, the energy used is how much energy is used to create the lighting. This is measured in watts.

With a basic understanding of the importance of lumens and how to choose the right bulb for your space, you can make a confident, informed decision. The Lighting Facts should be a handy guide as to the capabilities of a bulb, but lumens is where you should focus when shopping.

Something Else To Check Out

What Does Kelvin Mean

LED Lights Last 10+ Years. We can help you make the right decision for your application. Call 513-702-3533 or 407-230-9096 or 513-325-1623 or 262-707-7288. These are our cell phones…we will not put you on hold or send you to another extension.

Sources

  • https://www.energy.gov/energysaver/lumens-and-lighting-facts-label

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"What Does Kelvin Rating Mean?" Was posted on January 22, 2019

What Does Kelvin Rating Mean. CRI, 5000K….what do these LED terms mean. LED lighting is here. Go to the local big box chain and try to buy an Incandescent light bulb. They are hard to find. Once you find them now you have to figure out how they rate them. It used to be if you needed a 60W bulb you went to the store and bought a 60W bulb. Not many choices. Today is a different story. Now you have a choice in Color ratings or Kelvin ratings. Do you want a 2800K a 4000K or 5000K?

LED Color Lighting Scale

Can you believe that these are all shades of white that are available. As a standard in your kitchen you probably have a can light that is a 2700K. This is a very soft color light that most people like in their kitchen. I personally like a little brighter because I like to see what I am doing but my wife rules in the kitchen so we have soft light. You can see above that 2800K looks pretty yellow but it is a soft shade of white.

COLOR TEMPERATURE or Kelvin… This indicates the “color” of a technology’s white light. Incandescent lighting’s white light is rather yellow and has a color temperature of around 3200K; daylight is around 5200K. Here is a glossary of terms you will come across when buying LED lights.

Shades Of White

A good point of reference is that the sun at mid-day measure 5780 Kelvin. If you look at that on the scale of color temperatures, that is already getting into the bluish range. So, what you perceive to be white light actually has a bit of a blue tint. Typical household lamps use bulbs in the 2000-3000 Kelvin range, and you probably consider them to be white as well. A candle registers at 1900K, so you can see how the glow of fire emits a warm white light. Keep in mind, these are all shades of white light.

Here are some LED Terms you should be familiar with…

COLOR RENDERING INDEX (CRI) The CRI of a fixture as an imperfect rating of how well a fixture can generate light in such a way that the illuminated object’s color appears correct. The closer to a CRI of 100, the more accurate the colors of an object should appear when lit by it.

INCANDESCENT LIGHTING This lighting technology represents the original form of creating light via electricity. A wire inside the bulb is heated up until to glows, emitting light. Most of the electricity is turned into heat, not light, making it a very inefficient form of lighting.

LED (LIGHT-EMITTING DIODE) This is an electronic device that generates light very efficiently as electricity passes through it.

Bottom Line: Today you have choices you did not have 15 years ago. Make sure you buy the right color when purchasing a new LED light.

Here is a Summary Of LED Lighting Today

Today all light has an overall color that is described as its color temperature and is also measured in Kelvins. Color temperatures above 5000K are described as cool (bluish), and colors below 3000 are considered warm (yellow/orange). Many people today are opting for 5000K in classrooms, offices and more because that color is like daylight and its very easy to read with a 5000K light. If you’ve ever looked out the window in the late evening and noticed that everything is totally blue outside while everything inside looks orange, then you’ve seen a perfect example of differences in color temperature. Natural daylight is on the cooler end of the scale and most traditional incandescents fall on the warmer end. As such, everything outdoors will tend to look blue while everything inside has a nice warm glow.

Taking Video Get The Right LED Color

Color temperature is a very important factor when considering LED fixtures for a performance space. If video cameras are involved this factor is critical because the camera is much more sensitive to color temperature than the human eye. A few hundred degrees too warm, and the world appears to be on fire. Too cool and everyone looks like a blue Smurf. Unfortunately, many of the LED fixtures currently on the market have color temperatures that are abnormally low or high for normal presentation uses. It’s important to verify that the color temperature is in the appropriate range as early as possible into a construction project.


Additionally, LEDs produce light in a very different way than conventional incandescent lamps. This difference can lead to a substantially lower ability for the light to render all of the colors in the spectrum in an accurate way, which is described as it’s color rendering index (CRI). CRI is rated on a scale from 1-100. The lower the CRI rating, the less accurately colors will be reproduced.

If the CRI is too low, strange things can happen! In some cases people with light colored skin turn dark and splotchy and certain colors have seemed to glow eerily under low-CRI light. While great strides are being made in this area, it’s another important factor to consider during the decision-making process.


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