Cree LED Revolution Blog

Cree and LED lighting are starting a revolution

Get il-LUMEN-ated with Lighting Facts: Knowing the Difference Between Lumens and Watts

Monday, October 17th, 2011

Cree is celebrating Energy Awareness Month with a series of blog posts about ways Cree and our products are helping save energy.

To help you become more energy aware, we’re going to drop some knowledge on you with what’s coming up in the wild and crazy world of lighting. As we’ve shared with you before here and here, beginning in 2012, you are going to start seeing new packaging and labeling on all household bulbs. The idea is that this information will help you save money by selecting the most efficient bulbs that fit all of your lighting needs.

Check this out…

Does that help? If not, maybe this breaks it down a little better…

light-bulb-chart2

Still confused? The National Association of Electrical Manufacturers (NEMA) also did an awesome job of explaining it in their The 5 Ls of Lighting – The Consumer’s Guide to Choosing Energy-Efficient Lighting.

Basically, forget everything you thought about when buying lighting products. Yup, everything. Erase it from your memory. You used to buy on watts, which measures the amount of energy required to illuminate lighting products. But with more energy-efficient lighting available, like Cree’s EcoSmart LED Downlight, you need to buy your lighting based on lumens, which measures the amount of light produced.

The more lumens, the brighter the light. For example:

  • 40-watt incandescent bulb = 450 lumens
  • 60-watt incandescent bulb = 800 lumens
  • 100-watt incandescent bulb = 1600 lumens

“Nutrition” Labels

Similar to the nutrition labels that you find on your food packaging, the new labels that will be coming in 2012 will have concise information about the bulb’s output and savings.

lighting facts label

Cree labels include:

  • Brightness (in lumens)
  • Estimated Yearly Energy Cost
  • Life-expectancy of the bulb
  • Light appearance and
  • Energy used

What Cree labels won’t include – Contains Mercury. That’s right, those other energy-efficient bulbs, you know the ones, the twisty-twirly CFLs contain mercury and will have to disclose that on their labels.

So now that you’ve been educated and you know how to shop, go out and get your Cree LED Lighting!

Indiana Tech upgrades oldest building on campus with LED lighting

Tuesday, November 23rd, 2010

Built in 1857, the Administration Center at Indiana Tech University is a landmark for generations of alumni who know that even as the campus grows, they can always count on recognizing the familiar historic brick building when they visit.

And now, the oldest building on campus is historic for another reason: It’s the first building on campus to boast energy-efficient Cree LED lighting.

The 153-year-old building was gutted for renovation in October 2009 with the goal of achieving LEED (Leadership in Energy and Environmental Design) certification. The resulting work transformed the pre-Civil War era building into a haven of energy-efficient technology and sustainable design.

outside

The historic Administration Center at Indiana Tech is a landmark for alumni.

When architect Terry Thornsbury of Viridian Architectural Design began planning the project, he said he knew he wanted to incorporate LED lighting.

“We wanted something that would help get us as many points as possible in the LEED system and reduce energy but also have a pretty good return on investment,” Thornsbury said. “Anyone who comes to me saying they want to save energy, the first thing I’m going to tell them is you’re going to want to do LED lighting because it makes sense these days to reduce energy consumption.”

Indiana Tech 1

Ninety-eight percent of the building is lit with Cree LED lighting.

The three-story building is lit 98 percent with Cree LED lights, helping the Fort Wayne, Indiana-based college conserve energy, reduce maintenance and provide beautiful light for employees, students and alumni. The 10,957-square foot building features:

  • 97 Cree LR24™ LED troffer lights. Offices, conference rooms and corridors illuminated with beautiful, clean white LED light. Each light consumes only 44 Watts while delivering 3,200 lumens. The high-quality light features rates 90 on the Color Rendering Index with a color temperature of 3,500K.
  • 61 Cree LR6C™ LED downlights.  Each light consumes only 10.5 Watts while delivering 650 lumens. The lights rate 92 on the Color Rendering Index and also feature a color temperature of 3,500K.
  • Long lifetime. The Cree LED lights are designed to last 50,000 hours. At the 50,000 hour mark, Cree’s LED lights are designed to provide at least 70 percent of their initial light output. That means the lights in the Administration Center could last more than 19 years based on the university’s projected use of 10 hours a day, five days a week.
  • Energy Efficiency. Over the long life of the LED lights, compared to a fluorescent downlight, the energy-efficient lighting in the Administration Center can save an estimated 259,700 kWh, which avoids 270 tons of carbon dioxide emissions.
  • Intelligent Control. The Cree LED lights work with an Intelligent Lighting Controls system with occupancy sensors and daylight harvesting, a control system that helps conserve even more energy by automatically adjusting the light level based on how much natural daylight is shining through the building’s large, preserved windows.

The University also worked with Primary Engineering, Inc., a Ft. Wayne, Indiana-based firm dedicated to sustainable design and CM Buck and Associates, Inc. which distributes Cree LED lighting in the Ft. Wayne area.

Indiana Tech Facilities Director Mike Townsley said he was skeptical an all LED-lit building would provide enough light for employees to work under. But that hasn’t been a problem, he said. Instead, employees are taking advantage of dimmers installed in each room. He said most employees are keeping the lights in their offices dimmed to 50 percent, which helps save even more energy.

“We’ve heard positive feedback about the lights,” Townsley said. “So far I’m pleasantly surprised.”

Mike Peterson is one of the university officials who moved into the newly-renovated building in July. He said he likes the controllability the dimmer in his office offers. He also enjoys the quality of the LED light.

“There’s good light distribution around the room,” Peterson said. “It doesn’t feel like there are dark areas or shadows.”

As director of Alumni Relations, Peterson says there’s another benefit to the LED lighting: Alumni like it.

“When you’re talking with alumni, any time you’re doing anything that’s technologically advanced it’s a plus,” Peterson said, adding that it’s a bonus that LED lighting technology is helping the school conserve energy. “[Alumni] feel like we’re being smart with the money that’s invested by them,” he said.

The building houses the Alumni Welcome Center, which is designed to be an inviting place complete with a fireplace made with bricks salvaged from the building. The warm, recessed Cree LED lighting adds to the ambiance, he said.

Cree LR6C LED downlights and LR24 LED troffer lights illuminate the building.

Cree LR6C LED downlights and LR24 LED troffer lights illuminate the building.

The Administration Center renovations were made possible by a $2 million donation from alumnus Wilfred Uytengsu, Sr., who wanted the money to go toward energy-efficient improvements. The building was recently renamed the Wilfred Uytengsu, Sr. Center in his honor.

And while Thornsbury was initially hoping to achieve LEED Silver level certification, the project exceeded expectations and has been submitted for Gold level certification. We’ll let you know when Indiana Tech receives final word from the U.S. Green Building Council.

Will new labels for light bulbs make it easier to select lights?

Monday, December 14th, 2009

Have you ever stood in the lighting aisle at the store and picked out a bulb based on the wattage, only to come home, screw it in and see that it was way brighter (or dimmer) than you expected? It’s an easy mistake to make, especially when you’re buying energy-efficient lighting.

The Federal Trade Commission is proposing new labels for light bulbs that are based on light output instead of energy consumption, a move that could make it easier for consumers to pick out the bulbs they need.

Under the proposed change, the front of a bulb’s package would list the brightness in lumens and the estimated energy cost per year. Flip the package over, and you would find a “lighting facts” label that includes details on life expectancy, color appearance (warm to cool) and energy use in watts, under the proposal. The labels would also require acknowledging whether bulbs have mercury (CFLs contain mercury, but LEDs don’t). Take a look at the proposed changes here:

proposed change

Those of us who grew up with incandescent bulbs knew that an average 75 Watt bulb was going to be about twice as bright as a 40 Watt bulb, even though light output is measured by lumens and not watts. But since energy-efficient lights like CFLs and LEDs produce more light while using less energy, you can’t really judge their brightness based on their wattage.

To get a fair comparison on brightness, you really need to look at lumens and not watts. Consider this: This month Cree announced that we were able to achieve 186 lumens per Watt for a white power LED. That’s pretty remarkable when you consider the average 25 Watt bulb produces 215 lumens.

Now, it’s important to note that we’re not currently putting that 186 lumen per Watt LED in a light bulb. But our business is basically built on the premise that it’s possible to produce bright light while saving energy.

But back to the bulbs…as traditional incandescent bulbs are phased out, it will become increasingly important to make sure consumers understand how the new energy-efficient lighting they’re buying will perform. That’s also why I blog about issues like this. The more you know about LED lighting, the better!

And for those who think LED lights will never be viable, definitely take a look at the full report the FTC made on the proposed label changes. Among the many bright spots for LEDs in the report is this:  “The Commission believes that labeling for LED bulbs is likely to assist consumers in their purchasing decisions because they are substitutes for incandescent and CFLs and are likely to become increasingly available for household use.”

Coincidentally, one of our Twitter followers recently asked us why bulbs aren’t measured in lumens v. Watts:

TWEEP QUESTION

Well, @Chris_Gammell, we hope this post helps answer your question! If you need more details, check out this post by Jim Brodrick, who oversees Solid State Lighting for the Department of Energy, about the proposed change.

What do you think about the FTC proposal to change the way labels look? Do you think this will make buying a light bulb easier?