Mar 24, 14
In past blog entries, we’ve suggested using dimmers to provide mood lighting and save energy, but a lot more goes into choosing a dimmer than you think. Have you ever installed a dimmer only to find that it shortens the life of your bulbs or doesn’t work at all? Chances are you’ve chosen the wrong dimmer for the light sources you’re using or the type of wiring you have in your home.
As nice as it would be to be able to install one dimmer with any lighting system and have it work perfectly, that’s just not the case. There are many types of dimmers, all designed to be compatible with certain light sources and lighting systems. When choosing a dimmer for your lights, here are the important factors you need to consider.
Jan 03, 14
Christmas has come and gone, and it’s now the start of a new year. What’s that mean for you? Quitting a habit, like biting your fingernails or finishing other people’s sentences? What about reducing your energy consumption, thus reducing your electric bill? While we support the other goals, reducing your energy consumption sounds a little better. Below are some things that will help you reduce your energy costs in 2014.
Jun 29, 12
It’s a long accepted fact that production of the hormone responsible for sleepiness, melatonin, can be suppressed by light. The pineal gland uses the presence of light to determine when to release and suppress the hormone, setting our “internal clock” to a cycle of wakefulness and sleep, also known as a circadian rhythm. Not surprisingly, the large amount of artificial light we encounter in the modern world can have a negative effect on this cycle by suppressing melatonin production even at night. However, recent studies suggest that not just the amount of light, but also the color of the light we encounter may affect our sleep cycles.
A 2005 study conducted by researchers at Kyushu University in Japan suggests that exposure to high color temperature light immediately preceding bedtime reduces the length of stage 4 sleep. In the study, the researchers exposed different subjects to 3000K, 5000K, and 6700K light sources for 6 hours before going to sleep. Researchers monitored the subjects’ sleep patterns and came to this conclusion:
Given that the S4-sleep period is important for sleep quality, our findings suggest that light sources of higher color temperatures may reduce sleep quality compared with those of lower color temperatures.
Other studies by the University of Basel in Switzerland and the University of Connecticut found similar results.
Though these findings are not yet accepted scientific fact, it’s worth noting that manufacturers have already started to create products with these ideas in mind. Philips, for example, produces an entire line of “Wake-Up Lights” that use increasing light intensity and color temperature to wake you from sleep, a method that is marketed as a more natural alternative to alarm clocks. The computer program and smartphone app f.lux reduces the color temperature of screens for less obtrusive nighttime reading. On the flip side, companies have long used “full spectrum” office lighting to increase alertness and productivity, assuming that if high color temperature lighting discourages sleep, it must also encourage wakefulness.
While the scientific community works this all out, what can you do now to improve your sleep? Start with what we do know: Bright light of any color temperature suppresses the production of melatonin, so limit the use of artificial light in the hours preceding sleep. This is easy to do with dimmers, 3-way bulbs, and even low wattage bulbs. Second, conduct your own study: If you currently use high color temperature bulbs and have difficulty sleeping, switch them out for soft white or warm white bulbs and see if you notice a difference.
If you try these ideas out, we’re curious about the results. Does color temperature have any effect on your sleep? Let us know in the comments, or drop us a line on Facebook, Twitter, or Google+.
Apr 13, 12
Before buying a CFL or LED light bulb, get rid of any notions you have about incandescent equivalencies. How many times have you bought a 60-watt equal CFL or LED only to be disappointed by how dim it was (or blinded by how nauseatingly bright it was)? Because there is no agreed-upon standard among manufacturers for determining equivalent wattages, statements of incandescent equivalency for CFLs and LEDs are not always dependable. So to light your home the way you intend, stop thinking about watts and start thinking about lumens.
If you read our previous article on lumens, candlepower and CRI, you may remember the definition of lumens. If not, here’s the gist: “Lumens…represent the actual amount of ambient light coming from a lamp. The higher the lumens, the more ‘lit up’ a room will be.” However, while a definition of lumens is nice, if you’re like us, you’re probably asking the real question, “How many lumens do I need to light up my room?” The answer will vary based on the design and color scheme of your room, but here is good rule of thumb, loosely based on the IESNA Lighting Handbook:
Floors: 20 Lumens per Square Foot
Tables and Raised Surfaces: 30 Lumens per Square Foot
Desks and Task Lighting: 50 Lumens per Square Foot
For the average living room of 250 square feet, you’ll need 5,000 lumens as your primary light source (20 lumens x 250 square feet), equivalent to about five 100 watt incandescent light bulbs, five 23 watt CFLs, or eight 10 watt LEDs. Since you probably read on your couch, you’ll also need about 4 square feet of task lighting on each end of the couch. That’s 200 lumens each (50 lumens x 4 square feet), but you’ll need more if the light source is a lamp with a shade. In your dining room, you’ll want about 30 lumens per square foot on your dining table (you want to see your food, but not examine it), so if your table is 6 x 3 feet, that’s 540 lumens.
Create Your Own Room Layout at FloorPlanner.com
Keep in mind, however, that these numbers are for typical conditions. If you have especially dark walls and furniture, you’ll need brighter light sources. The distance of your light source from the surface also changes the equation. We based our calculations on 8-foot ceilings and average height task lamps. Finally, personal preference will play the largest part in your decision. If you like the room to be especially bright, you may want to add 10 to 20% to our numbers. In fact, the best idea for any home may be to aim high and install dimmers to bring the light level down to where you want it.
So how much have you thought about how many lumens you need for your home? Are our numbers too high or two low? Let us know in the comments below, on our Facebook or Twitter, or even post a photo of your home on Pinterest and share it with us!
Feb 17, 12
1. They save energy
When you crank down a dimmer, you are lowering the amount of power sent to a bulb. The more you dim the bulb, the less power you use, resulting in lower energy use.
2. They make bulbs last longer
As discussed in a recent blog on how to extend the life of a light bulb, delivering less power to the bulb reduces the stress on an incandescent or halogen bulb filament. The less stress the filament is under, the longer it will last.
3. They’re good for the environment
This goes back to reasons 1 & 2. Using less power means saving electricity, potentially reducing pollution produced by power plants. Longer bulb life also means throwing fewer bulbs away, resulting in less landfill clutter.
4. They’re good for your health
In addition to reducing pollution, some scientific studies suggest dimming lights in the evening has less negative effect on sleep cycles than burning bulbs at full power because dimming a bulb also lowers its color temperature, replicating the effect of the setting sun.
5. They make rooms look better
Let’s face it. Rooms with dimmed lights just look more inviting, even romantic. Next time you go to a nice restaurant, take a look at the lights. Nice aren’t they? Now go to McDonald’s. Not so nice, huh? The secret is dimming.
6. They make you look better
You may be a pretty girl or a handsome guy, but that doesn’t mean lighting can’t still help. When you dim a bulb, you are changing the light from bright white to a warm, inviting tone, softening the appearance of your hair and skin.
7. They’re easy to install
Contrary to what you may think, most dimmers are incredibly easy to install. Just turn off the power at your breaker, remove your standard toggle switch, and replace it with your new dimmer. The same 3 wires you disconnected from your toggle switch (positive, negative, and ground) attach to the dimmer in the same configuration.
8. They’re cheap
This may be the best reason of all. While sophisticated, multi-location electronic dimmers like the Lutron Maestro can cost upwards of $25, a standard rotary dimmer or slide dimmer will cost less than $10. For less than a $10 investment, what do you have to lose?