Posts Tagged ‘lighting’

In home electric monitoring, Real Time Data and Age Old Adages

May 24, 2012

By U.S. Air Force photo by Edward Aspera Jr. [Public domain], via Wikimedia Commons

NYT reported last month that although there are some early adopters of monitors of electric use in our homes, it is predicted that more than half will have them in the next ten years.    Notable in the Times article is a quote from Dan Yates, CEO of Opower: “Simply making energy usage visible can have an impact”.   I can believe that; after all, “knowledge is power”, right?

Blending physics, and metaphor, with this age old adage (I can’t resist throwing in some physics), power implies transformation.  It is a function of using energy to do work.  My point is that energy monitors aren’t worth squat unless we change our behavior based on what they tell us.  In fact, since you plug them in, they use electricity, they don’t save it.

Local utilities are offering energy data with things like the green button which we’ve written about in the past. Changing light bulbs to CFLs or LEDs can make a big impact with electric loads.  When you use electricity—for A/C or to heat water for example—more efficient systems can make a difference; and so can improving the home in other ways.   The gains in insulating and air sealing, proper shading, and good windows can really make an impact on your energy usage as well as your comfort.

I wonder if the adage “A little knowledge is a dangerous thing” is relevant?  Don’t get me wrong, it’s good to keep an eye on your electrical usage, but don’t get caught watching and not acting. Or maybe, “a fool and his money will soon part” fits too.

Thanks,

Jason

Lights, Vampires and Holiday Wishes!

December 6, 2011

 

nbc chicago image

Maybe you’ve seen this already, its’ been floating around the web, but I Love this picture.  Some of us go for broke when it comes to holiday decoration.  I’m only lightly (sorry) using the metaphor “going for broke”.

We celebrate this time of year as the skies grow darker earlier and the season shortens for cultural and religious reasons and just plain fun.    I’m more in the Ditto camp, but we do have a Christmas tree.     

Out of curiosity I used a nifty device called a Kill-A-Watt, and I metered my own Christmas tree at home.  We like the old school lights, the big bulbs and the bubbling ones. One year we left a strip plugged in lying on the couch and burned a hole in it.       

Well, my little tree with a few strips of lights big and small draws about 320watts.  I have an electric tea kettle that boils water with less wattage.  I can make coffee with that.   A co-worker’s tree with LED lights draws about 20watts. 

I’m probably not going to change. I like the light from the tree.  It makes me happy.   I suppose although it’s not efficient, it helps heat my house. (Yes, heating my house in Maine with light bulbs is not necessarily the smartest economic move I’ve made!)

Question I have now is “how about all the other things with clocks and lights, plugged in but not doing anything.”  Mike has mentioned “smart” power strips in the past.  This might be a good stocking stuffer for some (well if you have a big stocking I suppose).  Our TV’s and their electronic entourage, sit around waiting to entertain drawing power with their clocks lights and standby modes.  Set top boxes and DVR’s  can have a huge draw and can be worse than a good refrigerator!       

We make choices with our home and what we do to run the things in them, and it’s good to make informed ones.   Using energy costs money.  Wasting energy costs even more. Maybe the “Ditto” family has some extra cash for the presents under the tree instead, or a week in the Bahamas.  What would you do with the money you’re wasting needlessly on phantom loads?  Oh, don’t forget:  air leaks, spotty insulation, old inefficient heating equipment, leaky ductwork….What does your holiday wish list look like?

Cheers!

Jason.

The Ancestors

October 7, 2011

Old light - New light

True to form as an American, my family is a hodge-podge of ancestry new and old,  New Englanders that were Mayflower descendants, mid-western farmers who were horse thieves or ministers, to immigrants here for just a few generations scraping by working in mills.    I don’t think they ever made it to America, or if they did the left, but somewhere on my wife’s side of the family tree are Vikings.  I imagine they were probably good at plundering, lighting their way with a good oil soaked torch.  It’s good to know where you come from.

In the lighting family tree, the baby of the bunch is the LED light attempting to unseat the CFL as the next best thing.  I’ve mentioned some innovations with LED’s recently, Mike’s talked about Cree lighting  and we know it’s important to conserve with lighting as well. But If I had to ask any of those family members from long ago if they would rather spend $1 or say $30 on a light bulb (accounting for inflation and converting it to the currency that makes sense, say Viking Pennigars) I can guess the response.

Over generations things change, for one thing, humans now tend to live past thirty. Light bulbs last a lot longer too, especially LED’s.   That sure is a bonus when the fixture is way up there, and requires a ladder, maybe a really long ladder!    As I think about the benefits of LED lighting, I thought it would be good to find out where it came from and how it works compared to other types of bulbs.  

LED stands for Light Emitting Diode, a diode being a thing that electric current flows through.  Electrons flow, photons are emitted i.e. light. They are small and efficient but expensive.  

Most are familiar with Compact Fluorescent Lighting, a CFL has a phosphorus coating on the tube that lights up when the argon and mercury vapors inside get charged with electricity. 

The old fashioned incandescent bulb is essentially a heating element surrounded by gas which produces light.  In fact an incandescent bulb 90% of its energy is emitted as heat rather than light, not very efficient for lighting but great for heating except that for most electric heating is not very cost effective.

GE invented the first practical LED in 1962 those of a certain age will recognize them as the vibrant red of clock radios watches and pocket calculators (these things now come in smart phones almost exclusively, but that little flashing green light telling you there is a message is also a LED) They’ve gotten better since then.

So what’s good about a LED lightbulb?  Longevity:  some last 35,000 – 50,000 hours better than a CFL’s 7,000-10,000 hours or an incandescent’s 1000 hours or so.   Very inexpensive runtimes, a draw of 10w or so, a variety of color, blending different colors manufacturers can get a light that pleases the eye.  Unlike CFL’s it’s not recommended that you evacuate the room when they break, and LED’s are dimmable.  Next week I will talk about a few LED’s on the market now as well as some coming out by the end of the year that promise to be even better.  Much better than whale oil lamps and torches, that’s for sure.  My apologies to any relatives still using those, but there is a better way.

Thanks,

Jason

image of Match and LED’s from Wikicommons

The Incandescent Lighting Meltdown

May 7, 2011

You know I’m a fan of the CREE CR6 LED light.  Mostly because it performs great.  And partly because it’s energy efficient.

Standard incandescent lights waste about 90% of their energy use on producing heat instead of light.  Think about that in the hot summer months every time you turn a light on!

Well, the folks at CREE found a good way to demonstrate this using the Easter Bunny.

Think about that as we head into the summer cooling season.  You pay to waste electricity on inefficient lighting.  And then you either sweat or pay again to remove the extra heat with your air-conditioner.  A double whammy.

More commentary on the CREE CR6

January 1, 2011

I received a comment on yesterday’s post about the CREE CR6.  Rather than leave the comment and the response buried in a comment section, I’ll pull this out into a front-page continuation of yesterday’s post.

David B. wrote:

Mike, not to be a spoil-sport, but I don’t think a $50 light bulb is worth getting excited about. First, LED’s don’t use dramatically less energy than a CFL (the $200 savings is compared to an incandescent). Second, if a product can’t pay for itself in a couple of years, most people aren’t going to bother.  Finally, the 35,000 hour life expectancy is a bit misleading. That works out to more than 20 years at 4 hrs a day (someone energy conscious enough to spend $50 for a bulb is probably obsessive about turning off lights that are not being used presently).

While LED’s offer some aesthetic and performance advantages over CFL’s, the price probably needs to drop below $10 before they make any sense.

Hi David,

The right LED lighting makes a lot of sense right now!  And I’m going to get excited anyway!   On a New Year’s morning, here’s a thumbnail version of the reason why.

I like the non-energy performance and appearance of the CR6 and LR6 better than the incandescent they replace.  And some people like “better” over “cheaper”.   When “better” is cheaper than “cheaper” that’s even better!  (Whew—try saying that fast five times.)  And over the life cycle, these certainly are less expensive.

I disagree with your statement that “if a product can’t pay for itself in a couple of years, most people aren’t going to bother”.  That is a common fallacy in the energy-efficiency world, and it ignores the real reasons that most of our customers pursue energy-efficiency, namely for comfort, health & safety, durability of the home, and even aesthetics!  Energy-efficiency is often a nice way to pay for these benefits for many people.  And examples of this abound.  Windows is one—and we see payback on windows stretching to 40 years-plus in some cases.  [By the way, this doesn’t mean we don’t educate people about the low-hanging fruit of air-sealing, insulation, duct-sealing, etc.  We install more of those services than windows.]   What’s the payback on a granite countertop?  A sofa?  An Xbox?  A trip to the Grand Canyon?  What’s the payback on making your daughter’s bedroom more comfortable all summer or winter? 

As I’m sure you’re aware, many people don’t like and won’t use CFLs.  And even though I used them in recessed light applications, the quality was inferior than incandescents in characteristics including light quality, color rendition, and dimmability.  And that means that the stuck with incandescents.  I’ve noted this in the California market, for example.  In these cooling climates—and high electricity rate markets—in particular this is a shame.  Not only are people forgoing the savings on the lighting side, but the inefficient lighting is dumping heat into the space that they there pay to remove with air-conditioning.  A double whammy.  Having a product that people are willing to use is a game changer.

In new construction applications, or retrofit applications where trims are being installed (or replaced) anyway, the cost is the CR6/LR6 is actually overstated by about $10—because it includes an integrated trim already.  Plus, installation is quicker than with a two-step trim-lamp-process.  Not much, but minutes add up.

In some high-bay applications with 9-, 10-, or higher ceilings, a 35,000 hour life (or a 50,000 hour life in the case of the LR6) is a huge deal.  Some people have to pay a professional to change their lamps—and avoiding this covers the cost of the LEDs even without the energy savings!   This is certainly true in commercial situations as well.  You may be handy and not afraid of heights or ladders (and have the appropriate ladder), but for some people this is a very important factor.

I’ll note that it took me three tries to find these at the Home Depot in NY—because they’d already sold out at the first two and they were waiting on the next shipment.  So some people are recognizing the value already. 

These already make sense.  We don’t need the price to change a penny for that to be true.  I do agree that they won’t have broad market appeal at that price point yet.  I’ll expect the prices to drop steadily in the coming years.  They have already dropped over the last 18 months.   But people can feel good about starting savings today.

Happy New Year!
Mike

CREE CR6 is on the streets–and it looks like a winner!

December 19, 2010

[Note--see longer review posted on Dec 31, 2010.]

I finally got my hands on a the LED CREE CR6 for recessed lighting applications and gave it a quick test run.  It looks and works great.  I’ll post a more complete review soon, with pictures.  Meanwhile, I’m giving it a big thumbs up.  It and the CREE LR6 stand at the top of the heap, with HALO’s LED fixture not far behind (and ahead in a few applications).  Here’s a product that in many respects beats all comers in its class–incandescent, halogen, and flourescent (and other LED) lighting.

Thanks,
Mike

CFLs and Dimming

July 20, 2010

Compact Fluorescent Lamps (CFLs) have gotten a bad rap. And in many cases, because they deserved it. Ugly light quality, annoying humming, and much shorter-than-rated lifespans plagued CFLs of yesteryear.     

But thanks in part to improved technology and higher ENERGY STAR standards, today’s CFL are excellent.  Good quality, good light, good performance, and still energy-efficient.    

One of the challenges with CFLs has been dimmability—or rather lack thereof. And most CFLs still aren’t dimmable. However, some are. And when connected to a high quality dimmer, these dimmable CFLs are efficient and good quality. I won’t geek out on the technical issues that have been addressed here other than a couple of short points. Dimmable CFLs have a different ballast than standard CFLs—the ballast are designed to operate as the power level drops, and the ballast sends a decreasing amount of juice to the bulb. And quality dimmers adjust to current to the light.

 

Philips Marathon dimmable CFL

If you want CFLs that dim, get a dimmable CFL! You’ll get better results with a good dimmer. I like the  Philips dimmable bulbs and the Diva dimmer by Lutron.   But don’t expect the full range of dimmability you’d get with incandescents.  There are some decent ciculine and GE’s double-U shaped bulbs, especially in dedicated torchieres.   [You can get even better results with T-5 linear flourescents with dimmable ballasts--but you won't have the flexibility of a variety of fixture types.]

When buying CFLs you’ll also want to pay attention to the “temperature” and this works the opposite of what you might expect. A higher temperature number gives a whiter light—often advertised as “cool”. A lower temperature number gives a more yellow “warmer” light than we associate with incandescent lighting and which most people prefer in their homes. Higher/cooler, lower/warmer—hey, I don’t decide this, I’m just reporting! And look for ENERGY STAR. Their spec includes quality standards, and their website includes buying guidance.   

Thanks,
Mike
 

 


Follow

Get every new post delivered to your Inbox.

Join 1,855 other followers

%d bloggers like this: