Dec 22, 12
For this week’s issue of Light Post, we’ve collected some excellent lighting stories, from a Dallas-area Christmas light tour, to some last-minute holiday lighting tips, and even a scoop on how LED lights are helping astronauts sleep. So, post up in your favorite spot and enjoy Light Post.
Farmers Branch Offering Tour of Lights
If you live in the Dallas/Fort Worth Metroplex, check out the Tour of Lights in Farmers Branch. This drive-through event features hundreds of thousands of Christmas lights and displays. To get there from the intersection of Interstate 35E at Valley View Lane, follow the candy cane signs down William Dodson Parkway to Farmers Branch City Hall, through the DART station area and to the Farmers Branch Historical Park. What makes this event even sweeter is that it’s FREE. The Tour of Lights runs through December 1 to New Year’s Eve.
Holiday Lighting Safety Tips
These tips come all the from Wayne County, NY, but lighting safety tips are universal and will ensure you have a safe holiday season.
- Make sure you inspect your lights each year before putting them on the house. Look for worn or frayed receptacles, cords, and loose connections. If you find anything out of place, replace your lights with new ones from 1000Bulbs.com.
- For those who’ve seen ‘Christmas Vacation’, you know that electrical cords and cats don’t mix. Well, neither do toddlers and electrical cords. Make sure cords are out of reach of your four-legged friends and the kiddos.
- The only hassle with live trees is keeping up with all the stray needles and refilling the water when your cats drink out of the tree holder. Having a live tree takes a few more safety steps. Cut the base of the tree at a 45-degree angle to allow water absorption. Also, use mini lights as they produce much less heat than regular lights and reduce the drying effect on the tree. Pesky, water-drinking cats aside, your tree will drink anywhere from a quart to a gallon of water each day, so refilling the water prevents the tree from drying out.
- All of these safety tips are no replacement for checking and replacing the batteries in your smoke detectors.
LED Lights to Combat Astronaut Insomnia
Apparently sleep is tough to come by on the International Space Station. NASA flight surgeon Smith Johnston explains why: “The station is noisy, carbon dioxide is high, and you don’t have a shower (seriously?).” This is why NASA is spending $11.2 million on switching out the space station’s fluorescent lights for color-alternating LEDs. The LEDs will alternate from blue, white, and red, based upon the time of day. NASA says it plans to have the switchover completed by 2016.
LED Lighting Options Help Christmas Displays Go Green
One year, I put about 7,000 lights on my parents’ house. They liked the lights, until they got their electric bill. However, there are a lot of money-saving options like LED mini lights. LEDs are the most efficient lights you can buy, and will save you a ton in electricity costs. Powering 600 incandescent lights for six hours a day will cost about $80, while the same number of LED lights will cost only $7.
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+.
Feb 21, 11
Full spectrum lighting is an industry term for lighting which offers wavelengths from all parts of the light spectrum. Light is a form of electromagnetic radiation visible to the human eye. There is a range of the electromagnetic radiation wavelengths. The visible light lies between the infrared and ultraviolet frequencies in this range. Most household and commercial lighting only uses part of this range of visible light. This is due to the technology used in the bulb. The light coming from a light bulb can affect many things in both the plant and animal worlds.