single product banner

Why use LED as the light source of solar street lights? How to solve the problem of light decay?

led lighting influences the activity of bats sciencedaily

sep 01, 2016 the widespread replacement of conventional bulbs in street lighting by energy saving light emitting diodes (leds) has considerable influence on bats as urban nocturnal hunters. opportunistic bats

Get A Free Quote

a simple and cheap dark detecting led circuit | evil mad

i am in the process of developing a 8 x 8 light sensitive led wall that as a person passes by the wall, wherever their shadow casts, the led s will come in creating a live action "light shadow". i found all the parts you used with the exception of a ir light source.

Get A Free Quote

american medical association warns of health and safety

jun 17, 2016 using this rating, two different 3000k light sources could have fairly large differences in blue light content. therefore, the ama s recommendation for cct below 3000k is not quite enough to be

Get A Free Quote

lighting calculations in the led era | mouser

lighting calculations in the led era by james r benya, pe, fies, fiald, cree led lighting abstract. for decades, lighting calculations have been the backbone of lighting designs for almost all lighting applications, indoors and out. good practice in illuminating engineering dictates that the designer uses photometric data that is adjusted to meet the conditions of the intended application by

Get A Free Quote
[pdf]

comparison of ac and dc led light bulb efficiency for

in order to provide a consistent measurement and minimize the impact of external light sources on the measurements for light output, a box was constructed to house the standard a19 socket and block out external light sources, shown in figure 3 1. figure 3 1 experimental box the box was constructed out of scrap wood to keep cost down.

Get A Free Quote

8 things to do if your solar powered lights aren t working

many solar powered lights will still charge if they are not turned on, and by turning them off you actually allow the battery to get a full charge over several days of sunlight. it is an idea to do this regularly with solar lights .

Get A Free Quote

reduce light pollution everything connects

install reflectors to outline a driveway instead of putting in a row of lights. reflectors are cheaper to purchase, free to use and are unaffected by power outages. explore the top driveway reflector sites; reduce the light escaping your home and save money by turning on your exterior light's motion detectors so they only come on when needed. outdoor lighting is only necessary when you're

Get A Free Quote

security light photocell problems | ehow

the most common problem encountered with security lights controlled by photocells is that they shut off unexpectedly during the night. this can be the result of light falling on the photocell and increasing its output current to a level interpreted as daylight.

Get A Free Quote

hack a solar circuit science friday

sep 18, 2018 design and build your solar powered origami identify a problem that your origami, solar powered device will solve; make an origami pac man, hat, fan, crane, or other origami structure (an animatable) integrate and adapt your solar power circuit into your a technology using origami and your solar light circuit. origami fan that spins

Get A Free Quote

easy solution for led installations and retrofits using 12vac

some sort of outdoor, landscape lighting is needed in many residential and commercial areas. whether it just be small security lights, pathway markers, or just added accent lighting around the grounds, they run on a certain system and if you plan on switching to leds you will need to be aware of this.

Get A Free Quote

energy saving light bulbs

light emitting diode (led) and compact fluorescent lights (cfl) bulbs have revolutionized energy efficient lighting. cfls are simply miniature versions of full sized fluorescents. they screw into standard lamp sockets, and give off light that looks similar to the common incandescent bulbs not like the fluorescent lighting we associate with factories and schools.

Get A Free Quote

lighting what could cause flashing led lights when other

low power lights (leds or cfl) combined with some types of electronic switches or a switch with that little "find me at night" light will most probably flicker when off. because the switch will allow a very low current though it when off, which will slowly charge the led/cfl internal capacitor until there is enough voltage to turn them on for a

Get A Free Quote

how are leds affected by heat? | led lighting systems

pn junction for light emitting diodes, the portion of the device where positive and negative charges combine to produce light. pulse width modulation operating a light source by very rapidly (faster than can be detected visually) switching it on and off to achieve intermediate values of average light output; the frequency and the duty cycle

Get A Free Quote

flickering lights and how to fix them bob vila

solved what to do about flickering lights if you re frustrated by flickering lights, you re not alone. read the following response to a question posed by a reader with the same concern.

Get A Free Quote

15 advantages of leds when compared to traditional

here are the top 15 advantages of light emitting diode (led) lighting technology. they are listed sequentially based on their importance, starting with the most important item 1. led light lifespan easily the most significant advantage of leds when compared to traditional lighting solutions is

Get A Free Quote

how are leds affected by heat? | led lighting systems

pn junction for light emitting diodes, the portion of the device where positive and negative charges combine to produce light. pulse width modulation operating a light source by very rapidly (faster than can be detected visually) switching it on and off to achieve intermediate values of average light output; the frequency and the duty cycle

Get A Free Quote

the truth about blue light does it really cause insomnia

may 28, 2018 the focus on blue light began, he says, over 15 years ago, when we discovered there is a type of photoreceptor in the eye that detects light, but for circadian responses rather than visual

Get A Free Quote

health risks of high power led lights | healthfully

led are directional lights, meaning they don t radiate light 360 degrees like cfls do, notes the environmental protection agency 3. blue light waves are more likely to cause harm to the retina among people who are prone to macular issues due to aging, environment, genetics or

Get A Free Quote

light pollution wastes energy and money | international

quality lighting design reduces energy use and therefore energy dependence. it also reduces carbon emissions, saves money and allows us to enjoy the night sky. watch a clip of the documentary the city dark to learn how lighting design can reduce light pollution and also conserve energy.

Get A Free Quote

history of street lighting development of street

because the problem was there since humans started living together, history of street light is maybe longer than we think. it is known that natural gas was led through bamboo pipes from volcano gas leaks to the streets of peking to serve as a fuel for street lamps and that as early as 500 years bc.

Get A Free Quote

led tutorials for led lighting systems

when using led strip lights or led modules for your light boxes and channel letters it is important to know the right techniques to be sure that your leds can not be seen through the acrylic or plastic cover. visit this tutorial to learn proper spacing techniques to be sure that your light box and channel letters glow as one even light.

Get A Free Quote

understanding led lifespan how long do led lamps and

jun 20, 2017 lumen maintenance is an approach of measuring the light output (lumens) of a brand new light source and comparing that with its light output after a certain period of time. l70 and l50 are examples of lumen maintenance benchmarks for when 70 or 50 percent of a lamp or fixture's total light

Get A Free Quote

what's causing my lights to pulse? electricity wiring

mar 11, 2005 i took the light switch on the wall apart to get a better look at it and you know what i found out? it was one of those radio shack "control your lights from a remote control or home computer" switches. as far as i know, there aren't any other ones like it in the house, and the previous owners didn't use anything like that.

Get A Free Quote

pse | report a street light problem

if you notice a street light that's not operating properly, and it is not due to an emergency circumstance (i.e. flooding, downed power line, earthquake, etc.), please use the form below to report the problem. we'll respond to your email in the order that it is received, monday through friday.

Get A Free Quote

how to calculate led power | sciencing

calculating the power use of led lighting is a critical step for any battery powered electronics project, and thankfully it is simple to do. to calculate led power, you'll need to know your led's current and voltage, which you can find either through the use of an electrical multi meter or by consulting the packaging and manufacturer's materials.

Get A Free Quote

causes of light or switch delay electrical wiring

why a light fixture or switch may have a delay electrical question why is there a time delay when i turn on a light switch? i have a light on a ceiling fan that is operated from two 3 way switches. when the light is turned on, there is an approximate 1 second delay before the light actually lights.

Get A Free Quote

why go solar? the top 10 reasons | energysage

dec 06, 2019 there are many reasons why homeowners go solar, but improving the environment and cutting energy costs are the most common. many people are aware that solar is a great home efficiency upgrade and are eager to reduce their carbon footprint while also improving property value Get A Free Quote