Tag Archives: bulbs

Who IS Green Lighting LED?

Green Lighting LED is more than off the shelf. They’re your partner in designing and delivering complete solutions for your next lighting project.

Green Lighting LED is a family owned LED lighting OEM based in Northwestern Pennsylvania. Launched in 2007 by Joel Gehly, a lighting engineer with multiple patents and 30 years of lighting technology experience, the company quickly grew from humble beginnings to design, development, and local manufacturing innovative lighting products. In 2009 the company partnered and was mentored by the Erie Technology Incubator at Gannon University. Growing significantly throughout the incubation process this company quickly blossomed into a team of engineers and business professionals dedicated to creating local jobs and serving their customer base.

Now located in its own manufacturing and fulfillment plant in Erie Pennsylvania, Green Lighting LED strives to serve all people, its community and the environment through the supply of and manufacture of technologically advanced and eco-conscious products. The team at Green Lighting LED promotes and supplies innovative LED lighting products, LED bulbs and LED technology to consumers, in commercial, industrial and residential applications.

The entire team at Green Lighting LED is dedicated to doing business in a professional, honest and ethical manner, committed to treating customers, vendors and associates with respect. They endeavor to educate people about the technology of LED products. They work to provide honest and helpful information to their customers about “Green Technology” while offering top quality, fairly priced LED products to help our world environment.

Green Lighting LED is your source for quality, American LED lights and fixtures. With quality products backed with industry leading warranties combined with exceptional services, they bridge the gap between distributors, contractors and LED lighting solutions.

LED Lamp Beam Angle Comparison Chart

What beam angle should you chose for your next project using LED MR16s?  How about for your next recessed lighting project using PAR30s?  We want to help in your decision making process for selecting the right beam angle for your project.

First, and most importantly, if you install lights at a certain height, how much light will be on the surface area of your floor?  Our chart helps for a quick review, but for the ambitious just use the equation:


  5ft Ceiling 8ft Ceiling 10ft Ceiling 12ft Ceiling 15ft Ceiling
Light on floor at 15° beam angle 1.35ft Diameter Light Spread 2.16ft Diameter Light Spread 2.7ft Diameter Light Spread 3.24ft Diameter Light Spread 4.05ft Diameter Light Spread
25° 2.25’ 3.6’ 4.5’ 5.4’ 6.75’
40° 3.6’ 5.76’ 7.2’ 8.64’ 10.8’
120° 10.8’ 17.28’ 21.6’ 25.92’ 32.4’

Technically in lighting, beam angle is considered the points on both sides of the light spread where the intensity drops in half.  Say you have a 40° light bulb.  At 20° on either side of that central point the light intensity is ½ the intensity right under the bulb.  20° + 20° = 40°

After 40°, some light continues even outside of this range.  The light output of a lamp does not stop exactly at both ends.  Some light shines even outside of this range, but beam angle is determined where intensity or brightness of the lamp drop in half from the center point.  Take, for example, Green Lighting LED’s Energy Star Approved PAR38 LED in a 40 degree beam angle.  The lamp is emitting light 6 ft onto a ceiling.  Most of the light is within 40 degrees, but some light does escape beyond that 40 degree mark.

LED Lamp Beam Spread

Energy Star 40 degree LED lamp provides a smooth light output, evenly distributed.

Still, this light shows consistency within the 40° beam angle.  Energy Star requires that the light within 40° be smooth without hot spots.  Within the circle of light created by a lamp, Energy Star requires that light stay consistent…actually within 10% of anywhere else in the circle.  It is like painting a wall.  You want that paint to be smooth across the surface area.  Lighting requirements are the same concept.

LED Lamp Beam Angle Comparison

Picture compares a 25 degree vs 40 degree lamp. Side by side, the 25 degree looks brighter only because the beam angle concentrates the light in a smaller area.

Many people are surprised when a 25 degree lamp looks brighter on the wall versus a 25 degree lamp.  Actually, it is the same amount of light just more concentrated.  In our painting analogy, the amount of paint doesn’t change, but the surface area you are painting gets bigger or smaller.  Identical 25° & 40° lamps both have the same light output, but the 40° covers much more space and, therefore, looks a little dim.

Don’t get lost with loose terms like spot, narrow flood, flood, etc.  Those terms mean different things to different manufacturers.  When you chose to order LED lighting, specifically ask the manufacturer about what the beam angle means for their products.  If you order 25°, you want to make sure you receive an industry standard 25°.  This helps you compare apples to apples when sampling between different products or product lines.

For more information on LED lights and bulbs, visit us at Green Lighting LED.