Led Effect Lighting Is it possible to get the black light effect from LED's?
UV LED's? Do they do the same as a black light does? I want to get some black light effects in my car. Mainly just having my white clothes appear to glow etc.
Thanks
Be careful though -- UV light has some danger associated with it. If one or more of the LED's for example is shining in your eyes as you drive, then there is a real possibility of damage to your retinas over time.
Light-emitting diodes are darn cool and have found uses in so many places - traffic lights, standard lightbulb sockets and high-powered flashlights to name a few. The Multi-Color LED Lightbulb is a super bright LED bulb that can transition through dozens of color and rightness combinations and is compatible with a standard lightbulb socket...
Color:Multi Multi-Color Rotating Disco Ball This multi-color rotating disco ball will get your party started! Colorful lenses surround the 6 inch rotating ball spreading rays of color around the room Hardwired
Advanced reflectors High Density Negative Ionization Effective bandwidth: 60% Clinically demonstrated. EMF protected UL, CUL, CE Safety listed No harmful UV. Because the Sun Touch Plus combines SkyEffect Technology and Ion Technology , it provides powerful results using a lower level of 10, 000 LUX light making the treatment easier on the eyes and more enjoyable to use...
This super lightweight 160-piece-LED video light can be used in video taking. either for lights setup or supplement, the light intensity can be changed to offer professional effects.
After being connected with Power and switched on,The Red and Green Laser Will emit numbers of Stars, Which Make You Feel Like Walking in The Sky. The Effect of the stars can Rotate Automatically (Speed Adjustable)...
Build your own electronic lights and sounds lightsaber with 18 interchangeable parts that let you configure more than 1,000 different lightsaber combinations. Build your favorite Jedi, Sith or favorite character's weapon -- or create your own unique style...
This is the Hottest, Coolest Novelty to come out in a while!
Simply press the button to turn the unit on then insert the unit into your mouth. The Flashing Mouth Guard Blinks in 4 Alternating Colors - Yellow, Blue, Red and Green...
STAR WARS Lightsaber Room Light with Remote Control and sound effects... The final challenge in becoming a Jedi Knight is to build your own lightsaber. With the Lightsaber Room Light young Padawans can construct their own Jedi lightsaber and mount it on the wall...
This super lightweight 160 LED video light panel great for video and photography. Item can be used in video taking, either for lights setup or supplement. Fully dimmable light panel able to go from 0-max...
LEDGLOWs 4pc. 7 Color Interior Kit is jam-packed with an assortment of features and four super bright multi-colored LED tubes to illuminate your cars interior. This product allows you to choose between blue, red, green, purple, aqua, white or yellow colors...
The DEH-6300UB is an iPhone-friendly and flexible player that lets you enjoy your music from a variety of sources. It is fully compatible with iPod and iPhone, allowing direct control via the CD tuner, and ready to play back your CDs and digital files...
The Razer RZ03-00440100-R3U1 Marauder StarCraft II Gaming Keyboard's elevated keys are perfected for rapid commands and improved gaming performance. Your increased performance is monitored by an all new APM (Actions-Per-Minute) Lighting System that provides real-time performance feedback through changing color hues for a completely immersive gaming experience...
Glow Saber Duo Pack NW. Pack of 2 laser sabers for Wiimote on Nintendo Wii, 2 stylish Laser Sabers in which your Wiimote easily inserts "Laser effect" with internal lighting system: 17 LEDS in each saber Effect guaranteed even in full daylight! 2 Different Sabers for duels: 1 saber lights up in blue 1 saber lights up in red Functions with just 3 AA batteries - (not included) Provides about 40 hours of battery life Blades are rounded in soft plastic and easily detachable: Safe and easy to store...
Choose Your PathProduct InformationIt is four thousand years before the Galactic Empire and hundreds of Jedi Knights have fallen in battle against the ruthless Sith. You are the last hope of the Jedi Order...
Call of Duty: World at War Limited Collector's Edition from Activision for the PC completely changes the rules of engagement by redefining World War II gameplay. In this edition, players are thrust into the final, tension-filled battles against a new, ferocious enemy in the most dangerous and suspenseful action ever seen in a WWII title...
CHAUVET TRIDENT LED EFFECT LIGHT AT NAMM 2010 WITH IDJNOW
Why LED street light save engery ?
With the continuous energy consumption, the increasing scarcity of resources, the greenhouse effect on human beings become increasingly significant hazards, air pollution on the Earth's environment more and more serious, saving energy and reducing consumption requirements of the international community is increasing, today's energy conservation become the most important task. As early as 1996, China officially launched on the green lighting project, the lighting project to save resources, prevent pollution, and our future generations. Over the years, through the joint efforts of all various departments, as a fourth-generation semiconductor light source (LED) lighting products has been rapid development in the energy saving achievements. Chinese road lighting outdoor lighting accounts for a whole 30% of electricity consumption, and it is closely related to production and life. LED street lighting as an important outdoor applications, its advantages:
1. high-power long-life LED street lamp
Members of the focus of great concern, as many domestic and foreign experts and the company's products described in publicity pictures 5-10 million hours, and optimistic attitude, a matter of fact, high-power LED street lamp life depends on the following points: 1) LED light source chip quality, value-ray attenuation. 2) LED packaging technology, Consistency and reliability. 3) LED light source is a cold light, but the LED semiconductor itself will have heat. LED heat dissipation, LED to ensure good working conditions. (4) power supply, current-driven assure the quality.
2. energy efficient
Lighting is a systems engineering project, whether it is prescribed as the lighting or lighting the atmosphere are converted into electrical energy through light, through the projection lamp to be a partial head-to-head to achieve a certain degree of illumination, uniformity, color, and more than being head-to-head Local synthesis of a complete lighting projects, not simply to compare the use of power, but through an integrated, comprehensive analysis for comparison.
3. the differentiation between conventional lighting and LED lighting
Conventional street lighting is composed by the light shell, light source cavity and electrical room. Because there is sufficient space and the shell activated carbon and foam silicone rubber heat sealing installation to ensure that the working conditions of the source. The light source cavity protection grade IP65, protection rating electrical room IP45. As long as conventional lamps lighting conditions to ensure this protection, you can make any shape, Since the LED street lamp and the semiconductor launched the market, long-life light source, with easy superiority of a reasonable distribution of light, temperature variability, high color-rendering index of the edge, low-voltage, current power supply of the light source with a highly efficient energy-saving trends. Used for LED street lamps have natural advantages, its advantage lies in: 1) LED as a point light source, if the design is reasonable, to a large extent directly address the traditional spherical light-emitting light source has to rely on to solve the second take-ray and optical loss issues; 2.) Light irradiation uniformity surface controlled, in theory, can be done entirely in the target area evenly, which light source to avoid the traditional "bright light" phenomenon of light waste; 3) Color temperature optional, so the application of different occasions, but also improve efficiency, reduce costs an important way; 4) Technology is still considerable room for improvement.
4. LED streetlights with the rationality of the optical light
LED lights with different traditions, it has a point light source, high brightness, narrow-beam output and so on. LED street lamps so the first thing to consider the limited use of the full flux of radiation to the effective range, street lamps lighting the road asking for is the effect of the open space beyond the surface rather than the effective range of street lighting. Therefore, effective control of the distribution of light, so that LED light into a long strip along the surface with the direction of light spread, glare at the same time take into account the emergence of a new type of LED lighting design of the increasing demands made on staff.
5. the technical performance comparison for current LED streetlight
6. calculating the energy-saving targets (based on 12 hours per day): Energy savings per year = 365 * 12 * (0.5-0.16) = 1489.2 Electricity savings per year = 1489.2 * 0.8 = 1191.36 yuan After transformation of LED lamps, each lamp to save electricity 1191.36 yuan per year. If the entire road use LED street lamps, so the country will save a lot of power, by economic, a lot of money saved.
Well, I could partially understand what you want to say. Anyways, let me share a comment with you.
For any convex polygon the claim in problem 2 is trivially true. Now, Any concave polygon can be made by tiling up a few convex polygons. If we can show that for all convex polygons, each point on the surface of the polygon receives light from all directions then we are done. The reason is these points on surface receiving lights from entire 180 degree will act as a light source on the other side of the surface.
In fact, only one point in each edge of a convex polygon should exist such that it receives light from entire 180 degree. But alas, none of this happens. Let's take a regular triangle ( all sides equal ) and a light source somewhere inside it. Draw three mirror images of this triangle with each side acting as a mirror. You can fill up entire 2D plane this way. Now, there are countably infinite light source in the plane. You draw a straight line from any of these light source to a point on the edge of the original triangle. This line will tell you the way light will reflect in the from the light source of original triangle to reach this point. Thus, it is easy to see that receiving light from _all direction_ is not possible. But we can have dense ness, in a sense that given any angle $latex theta$ and $latex theta '$ we will have at least one ray which hits the point with angle lying between this range.
For non-regular convex polygon even this property is not easy to prove because while taking mirror images and trying to fill entire 2D plane, the images overlap which invalidates any ray path from a light source in a 2D plane to a point on the edge of the original polygon to be a physical possibility.
I hope you are able to visualize what I want to say. I guess a couple of figure would explain it better.
While I read this critically, I couldn’t help but imagine it footnoted with entries such as: >In the context of suspense, the lone light source is symbolic of life’s fragility; it signifies to readers that they already know what’s about to hit the fan.
Well, I could partially understand what you want to say. Anyways, let me share a comment with you.
For any convex polygon the claim in problem 2 is trivially true. Now, Any concave polygon can be made by tiling up a few convex polygons. If we can show that for all convex polygons, each point on the surface of the polygon receives light from all directions then we are done. The reason is these points on surface receiving lights from entire 180 degree will act as a light source on the other side of the surface.
In fact, only one point in each edge of a convex polygon should exist such that it receives light from entire 180 degree. But alas, none of this happens. Let's take a regular triangle ( all sides equal ) and a light source somewhere inside it. Draw three mirror images of this triangle with each side acting as a mirror. You can fill up entire 2D plane this way. Now, there are countably infinite light source in the plane. You draw a straight line from any of these light source to a point on the edge of the original triangle. This line will tell you the way light will reflect in the from the light source of original triangle to reach this point. Thus, it is easy to see that receiving light from _all direction_ is not possible. But we can have dense ness, in a sense that given any angle $latex theta$ and $latex theta '$ we will have at least one ray which hits the point with angle lying between this range.
For non-regular convex polygon even this property is not easy to prove because while taking mirror images and trying to fill entire 2D plane, the images overlap which invalidates any ray path from a light source in a 2D plane to a point on the edge of the original polygon to be a physical possibility.
I hope you are able to visualize what I want to say. I guess a couple of figure would explain it better.
While I read this critically, I couldn’t help but imagine it footnoted with entries such as: >In the context of suspense, the lone light source is symbolic of life’s fragility; it signifies to readers that they already know what’s about to hit the fan.