http://www.neonlightssigns.info/constant-light/
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5w LED Lighting Driver MBI6651 Constant Current 1A Step-down DC/DC |  |
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US $5.59 | 20d 19h |
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DC 6.0-12V 300mA 3x1W Power Constant Current Source LED Light Driver | |
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US $5.61 | 17d 7h 30m |
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1x 1x3W LED Power Driver Light Constant Current Regulated Transformer 85v-265v | |
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US $2.88 | 19d 21h 30m |
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5x 20W White HIGH POWER LED Lamp Light 1800LM + AC Power Constant Current Driver | |
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US $110.99 | 4d 19h 52m |
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GE 92696 CMH20/TC/U/830/G8.5 20 watt Constant Color Metal Halide Light Bulb | |
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US $22.95 | 28d 2h 24m |
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Constant Current Dimming Dimmable LED Driver For (6~12)*3W High Power LED Light | |
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US $24.99 | 18d 18h 26m |
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Constant Current Dimming Led Driver for 50W High Power LED Light | |
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US $27.99 | 16d 13h 32m |
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Constant Current Dimming Dimmable LED Driver For (9~20)*1W High Power LED Light | |
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US $17.99 | 18d 18h 36m |
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10x 3*1 Watt LED Power Constant Current Driver For LED Light Bulb Lamp 3W 220V | |
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US $26.31 | 24d 2h 1m |
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10x 1*3W LED Power Constant Current Driver For LED Light Bulbs 220V 3 watt | |
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US $26.31 | 24d 1h 59m |
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Constant Light
If the speed of light is constant, why does it go through some media faster than others?
I'm told that refraction (Air/water, water/glass, etc) occurs because the speed at which light travels through one medium is different from that at which it travels through the adjacent medium. But Light speed is constant universally, ....isn't it?
Backwards, forwards, sideways, in space, vacuum,
Or is it?
Good question
The answer is that the disturbance that travels through an optically dense medium (which we call light in general speaking) isn't purely light (EM radiation). It's a mixture of EM radiation and shaking charged particles. Consequently, this disturbance travels at less than c. This is why the speed of the E-M disturbance in the medium is usually called the APARENT speed of light. The actual, honest-to-god speed of light (that you use in relativity calculations) is always c, no matter what medium you might be bogged down in.
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5w LED Lighting Driver MBI6651 Constant Current 1A Step-down DC/DC | |
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US $5.59 | 20d 19h |
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DC 6.0-12V 300mA 3x1W Power Constant Current Source LED Light Driver | |
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US $5.61 | 17d 7h 30m |
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1x 1x3W LED Power Driver Light Constant Current Regulated Transformer 85v-265v | |
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US $2.88 | 19d 21h 30m |
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5x 20W White HIGH POWER LED Lamp Light 1800LM + AC Power Constant Current Driver | |
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US $110.99 | 4d 19h 52m |
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GE 92696 CMH20/TC/U/830/G8.5 20 watt Constant Color Metal Halide Light Bulb | |
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US $22.95 | 28d 2h 24m |
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Constant Current Dimming Dimmable LED Driver For (6~12)*3W High Power LED Light | |
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US $24.99 | 18d 18h 26m |
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Constant Current Dimming Led Driver for 50W High Power LED Light | |
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US $27.99 | 16d 13h 32m |
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Constant Current Dimming Dimmable LED Driver For (9~20)*1W High Power LED Light | |
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US $17.99 | 18d 18h 36m |
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10x 3*1 Watt LED Power Constant Current Driver For LED Light Bulb Lamp 3W 220V | |
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US $26.31 | 24d 2h 1m |
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10x 1*3W LED Power Constant Current Driver For LED Light Bulbs 220V 3 watt | |
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US $26.31 | 24d 1h 59m |
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Constant Current Regulated Driver for 25x1W LED Light | |
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US $11.93 | 21d 4h 50m |
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300mA Constant Current LED Driver for 4-7x1W LEDs Light | |
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US $6.58 | 19d 12h 31m |
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650mA 1x3W LED Light Constant Current Regulated Driver | |
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US $5.49 | 19d 1h 6m |
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5x 1x3W LED Power Driver Light Constant Current Regulated Transformer 85v-265v | |
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US $11.77 | 2d 18h 43m |
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Constant Current Dimming Led Driver for 30W High Power LED Light | |
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US $25.99 | 16d 13h 50m |
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1W LED Light Constant Current Source Regulated Driver | |
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US $5.70 | 15d 5h 33m |
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4-7 x 1W LED Light Constant Current Driver Power Supply | |
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US $6.99 | 14d 5h 30m |
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5w LED Lighting Driver MBI6651 Constant Current 1A Step-down DC/DC LED | |
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US $5.59 | 17d 13h 34m |
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Plastic Case Constant Current Driver for 4-7 x 1W LED Light | |
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US $6.48 | 13d 13h 55m |
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4-7 x 1W LED Light Constant Current Driver Power Supply 300mA | |
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US $6.97 | 13d 1h 37m |
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The Constant $6.49 The Constant |
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Constant $11.99 Constant |
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My Constant Travel Light T-Shirt by CafePress $22 If anything goes wrong, Desmond Hume will be my constant. Travel Light T-Shirt Tee, TShirt, Shirt This light t-shirt will be fashionable even after the zombie Apocalypse. In fact, this shirt might be the very reason you'll survive said Apocalypse. The light color shows you aren't worried about getting stains - and even if you were, those stains show t |
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Light Volume Ceiling or Wall Light by Prandina $980 Whether on the ceiling or wall, the Prandina Light Volume Ceiling or Wall Light offers clean, diffused lighting for your contemporary home. The shade is made up of an opal polypropylene plate held by a white polyester microfiber removable and washable envelope. Also features built-in constant-output electronic gear. Prandina is an Italian brand who started in interior lighting design in 1982. Since the outset, Prandina's creative philosophy has fullfilled criteria of simplicity and formal precision, functionality and lasting quality, enabling them to gain a recognised position in the international market. The Prandina Light Volume Ceiling or Wall Light is available with the following: Details:Shade made from an Opal polypropylene plate held by a white polyester microfiber removable and washable envelopeMetal fittingsMatte White finishRectangular ceiling canopyOptions:Size: Large, Medium (shown), or Small.Lighting:Large option utilizes one 55 Watt 120 Volt Type Twin Tube 2G11 Fluorescent lamp (not included).Medium option utilizes one 36 Watt 120 Volt Type Twin Tube 2G11 Fluorescent lamp (not included).Small option utilizes one 26 Watt 120 Volt Type Tube G24q-3 Quad Base Fluorescent lamp (not included).Shipping: This item usually ships in 3-5 business days. Dimensions: Ceiling Canopy for Large Option: Depth 27.62 In., Width 4.75 In. Large Option: Depth 35.37 In., Width 21.25 In., Height 6.75 In. Medium Option: Height 6.75 In., Depth 23.62 In., Width 21.25 In. Small Option: Depth 21.25 In., Width 11.75 In., Height 6.75 In. Ceiling Canopy for Medium Option: Depth 15.75 In., Width 4.75 In. Ceiling Canopy for Small Option: Depth 8.87 In., Width 4.75 In. |
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My Constant Travel Women's Light T-Shirt by CafePress $22 If anything goes wrong, Desmond Hume will be my constant. Travel Women's Light T-Shirt Tee, TShirt, Shirt Our 100% cotton women's tee is preshrunk, durable and guaranteed.5.6 oz. 100% cotton. Standard fit. |
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Constant Supervision Kids T-Shirt Constant Kids Light T-Shirt by CafePress $15 The pint-sized version of our popular adult favorite. It's preshrunk and durable - just what a playful, active tyke needs.6.1 oz. 100% cottonStandard Fit Constant Kids Light T-Shirt Tee, TShirt, Shirt The youth-sized version of our popular adult favorite. It's preshrunk and durable - just what a playful, active kid needs.6.1 oz. 100% cotton. Runs large, size down for better fit.. |
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The Constant Gardener $5.99 The Constant Gardener |
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Constant Future $8.99 Constant Future |
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Constant Companion $8.99 Constant Companion |
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The Constant Flame $12.49 The Constant Flame |
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The Constant Husband $9.99 The Constant Husband |
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Constant Replay $17.99 Constant Replay |
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3*1W 3W 180-Lumen White LED Spot Light Module with Constant Current Driver (100V~240V AC) $36.4 3*1W 3W 180-Lumen White LED Spot Light Module with Constant Current Driver (100V~240V AC) |
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Hellwig Leaf Spring - Heavy Duty LP-25 Constant Kit [97-03 Ford F-150 Light Duty] $246.47 Hellwig Leaf Spring - Heavy Duty LP-25 Constant Kit |
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The Speed of light, Hayabusa style
Engineering Mechanics of your Landscape Lighting System
This article will be a breath of fresh air for some of you and a gut wrenching process for others. Without getting too involved within the process, I will say this particular piece of the puzzle is designed for the person that thinks with the left side of your brain. Their many studies and books written about the left side and right side of our brains. Many people enjoy a “good” living dealing with issues relating to the left and right side of our brains. This could be the start of another book relating to that subject; however, I am not going there. Too keep this to the simplest form I can, I will say our brain is divided into two sides. We have the left side and the right side.
The left side of the brain functions by way of using logic, facts, knowledge, math and science and is detailed oriented. If you fall into this category, you will enjoy this article. Meanwhile, the right side of the brain functions by using feelings, images, symbols, sees the “big picture”, is very imaginative and believes things are possible by taking risks. If you fall into this category, I hope your partner is a left-brain person. This article will be dull and boring for you even though it is an extremely important process for you to achieve your “big picture” on your home to create the “WOW” effect you want.
My wife and I are a good team because she is a professional photographer, thus a right brain person. I am a left-brain person. We compliment each other and guess who takes pictures of my landscape-lighting installations. A good starting subject for this article is “voltage drop”. Voltage drop is created by internal resistance to the flow of electricity through electric wire or cable. It is the difference between the voltages at the beginning of a cable run compared to the voltage at the end of a run. We need to compensate for the voltage drop in order to keep the same voltage to all fixtures. If we do not, the end fixtures will have lamps with low voltage and the results will be a decrease in brightness. This is why we can see the yellow looking lights at the end of the runs.
The formula for calculating voltage drop is: Total Watts x Length of Run / Cable Size Constant = VOLTAGE DROP. You are now asking yourself,” What is cable size constant”. That is a predetermined amount and I will not show the chart for the different size cables. Instead, I will share the constants that you will use for your system. Use either a 10/2-gauge wire, which has a constant of 11920, or a 12/2-gauge wire, which has a constant of 7500.
With this information and the constants, lets figure a “run for fun”. This example shows a run for 80 feet and on the run, there are 4 fixtures that have a 20-watt lamp in each. We have a total of 80 watts on a run of 80 feet and 12/2 gauge wire is used for the run. 80-watts x 80 feet =6400, 6400/7500 (constant) = .85 voltage drop. Now subtract .85 (voltage drop) from 12 (amount of volts from source) and we have a resulting voltage reading of 11.15 volts. I like to keep lamps in a range of 10.5 volts to 11.7 volts for peak performance; therefore, the reading of 11.15 volts fits very will within the range. The main thing to remember is to choose the lamp you want and need to do the job you want. Once you decide on the lamp, engineer the system to supply the proper voltage to the lamp.
A rule of thumb on sizing wire for runs is to always go bigger if there is some doubt. The 10/2 gauge wire expense is just slightly higher than the 12/2 gauge wire; however, the peace of mind is well worth the difference. I have included a flowchart to use as an estimate on which gauge wire to use on which run. This does not replace the voltage drop formula and measuring every lead to every fixture using a multi meter to get the proper reading. For runs over 100 feet I recommend using the 12/2 gauge cable just because it can handle more with less voltage drop. QUICK WIRE SIZING GUIDE: Use the guide to select wire sizes for each run - “Are there more than 100 watts lamp load on the run”? If your answer is, yes then you Use #10-2 / If your answer is no then the next question is “Is the run longer than 100 feet? If your answer is no you Use #12-2 and if its Yes then you Use #10-2.
WIRE AMP RATINGS: Wire Size #12/2 100w/8.3A is recommended and the maximum is 192w/16A. Wire Size #10/2 140w/12.0A is recommended and the maximum is 288w/24A. You will notice the low chart gives the wire size with recommended and maximum figures. It gives reference to watts and amps. Remember the formula: (Amps x volts = watts Or Watts/volts = amps) you will be fine on amps using these guidelines. I keep a maximum of 110 watts per run on 12/2 cable and 150 watts on 10/2 cable. I know the system is not working hard and I feel that it will produce an efficient operating system.
About the Author
Roger Neumann has extensive background in aviation. He started flying when he was 15 years old and his parents had to drive him to the airport because he was too young to drive. His flying career started then and he finished his career with the airlines until the 60 years of age forced him out of the airlines.
During his career, he flew Army helicopters in Viet Nam and went from the Army to the Air Force side to fly fighter jets for the Missouri Air National Guard. He retired from the military with 23 years of service. Within the civilian arena of his aviation career, he flew nearly everything from turbo-props to jets. The last few years before retirement, Roger’s normal route was from Houston, Texas to Narita, Japan and back to Houston.
He incorporated the flying protocol of using a checklist and planning to create his system. He also carried the skill of being a perfectionist as a pilot into the landscape-lighting business that created his checklist type system. Because of that system, he was able to write an awesome “how to” book on installing landscape-lighting systems.
He wanted to create a book that was simple and clear enough to share with anyone that is interested in installing there own system but did not know how to complete the task. His guarantee is anyone who buys, studies and follows his book, can install a system that will turn their home into a showcase masterpiece. To locate his book, just start with http://www.landscapelightingabc.com
Roger graduated from Southern Illinois University with a B.S. degree in Business Administration. After he left the farm in Illinois, he always was involved in business and started several companies throughout the years. Six years before retiring from the airlines, he started a landscape-lighting company that is doing extremely well today. The combination of business and flying caused Roger to create a system that anyone can follow and be successful installing landscape lighting for their home.
For more information, visit Neumann’s site at http://www.abclandscapelighting.com
