What is Lighting: Definition and 87 Discussions

Lighting or illumination is the deliberate use of light to achieve practical or aesthetic effects. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting (using windows, skylights, or light shelves) is sometimes used as the main source of light during daytime in buildings. This can save energy in place of using artificial lighting, which represents a major component of energy consumption in buildings. Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants.
Indoor lighting is usually accomplished using light fixtures, and is a key part of interior design. Lighting can also be an intrinsic component of landscape projects.

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  1. sophiecentaur

    LED lighting: new developments?

    Does anyone have ideas about the possibility of (12V) LED units with higher powers and better colour (/spectrum) for domestic situations? I am reluctant to pay the high prices they are asking for the present ones if there is a possibility that something much better is on the horizon. This is...
  2. R

    Optical Revamping DIY Aquarium Lighting: Maximizing Efficiency and Functionality

    NOOB here. I am trying to redo my diy aquarium lighting. Currently I use 4x100 white led xmas lights. And they light great. Problem is, they are multi "8" function lights, I have them on timers, and when they come on, they default to one of the flashing functions, and I have to go at...
  3. H

    Lighting Avoidance Device Question

    Hey guys, Earlier this week in my meteorology class we learned a lot about lightening. Basically we discussed how the lower clouds in the storm are heavily negatively charged, and when lightning strikes the ground it is looking for a positively charged area to strike upon due to the fact that...
  4. Ivan Seeking

    Be a part of the interactive art lighting the Olympic skies

    http://www.vectorialvancouver.net/home.html Ou, en français http://www.vectorialvancouver.net/home_fr.html
  5. K

    Cherenkov Radiation for lighting

    After writing a physics paper on carbon nanotubes, I've been constantly wondering about a theory I invented and investigated in it, the theory being that because the electrons in carbon nanotubes travel closer to the speed of light when under the effects of any potenital difference than most...
  6. sophiecentaur

    Domestic LED Lighting: Finding the Right Lamp for Your Home

    I keep looking at adverts for LEDs in the home. None of the LED lamps I have seen in the shops look 'right'. They look like something in The Hitchhiker's Guide. Has anyone actually installed a lamp which looks nicer than (or even the same badness as) a CFL? I get really fed up with the slow...
  7. W

    Can We Light a Match on the Moon?

    Just watched the movie Avatar. Can we light up a match (or produce fire) where there's low/effectively no oxygen in the atmosphere e.g. moon? If not, can a spark still be produced? Thanks!
  8. Andre

    Explore Sunlit Subjects with Chiaroscuro Lighting

    In the new photo contest the subject is So that elicited this comment: So I like to answer to that with a few examples of Rembrandt lighting with an unprofessional onmipresent lighting rig, the sun. Now which one should I select? (ok this one required a modest fill...
  9. W

    LED Lighting Control: Dimming Channels with Resistance and Microcontrollers

    Hello. I am building an LED striplight for my room. For the device, I would like to have three separate channels so that I can easily color mix Cyan, Magneta, and Yellow. I know the basics of circuitry and wiring the channels, but I am not sure how to control the channels. I was considering...
  10. W

    Help with Inexpensive Pressure-Activated LED Lighting Project

    I am very inexperienced at wiring, and electricity in general, but was hoping to find some assistance in this forum. I am looking for a fairly inexpensive way to wire an LED to turn on when pressure is put on some type of sensor (not sure what would be needed). When there is no pressure, I...
  11. S

    Lighting Requirements, Industrial/Commercial.

    Are the lighting requirements stated in lux? Also, where would I go to find out the requirements for various settings? I looked around in the NEC book but didn't really find anything. Thanks for the help.
  12. L

    Radiant Power/Wavelength graph Lighting

    Homework Statement I have two graphs (Radiant Power vs wavelength) and I have to choose which one would be the best for a shop -- the one with the least yellowing. (fluorescent bulbs) I wasn't sure how to tell. The emission spectrums are very similar. The continuous spectrums are different...
  13. J

    Lighting up a lot (50) vacuum tubes

    Hi! I'm an artist with a basic knowledge of electronics. "Basic," meaning that I can lay out a sorta-complex schematic on protoboard and solder it up, as well as test it and debug it if it doesn't work (given many hours and some alcohol to stem the frustration). As for actually understanding how...
  14. B

    Troubleshooting Home Lighting Problem

    Hi Guys. I have a problem at home, and it's confusing me! My light bulbs are blowing, not just the filament fusing, but the whole base EC and BN are also arching through! Only when we switch on the light bulb, not when it already burning (on). It has an intense bright light for a split...
  15. TheFerruccio

    Designing a Lighting System for a Structure

    I wish to mathematically represent point light sources inside a structure, and figure out how much like is scattered throughout the structure. Specifically, I have lighting values of a certain amount of lux, and I need to ensure that the structure has a minimum of (certain value) lux touching...
  16. K

    Lighting up a fluorescent lamp with a Van De Graaf generator

    Hi all, Let's say i have the following: I approach a charged-up VDG holding a fluorescent lamp. The end nearest the VDG is labelled A and the end furthest away from the VDG is labelled B. My hand is holding the lamp in the middle, i.e between ends A and B. The region inside the lamp...
  17. L

    Creating a Room Lighting Device for Homes

    Hi friends, I need your help about a subject in my mind for a few months. This will be a project for a course. I want to make a device which controls the lights in the room. I do not know if anybody made this before or not. Also this thing will be useful for homes. You do not need to turn on...
  18. C

    Optical DIY LED Lighting: Homebrew Power Supply/Controller Ideas

    I'm currently playing with an idea to convert my living room and family room to LED lighting, however nothing on the market fits my needs so I'm thinking of a homebrew solution. I want to use a computer power supply or other stable 12volt source and then build a current regulator/dimmer...
  19. R

    Lighting Design Question (COMCHECK)

    I am doing a job for a retail store. They are 2000W over. I've looked over everything including allowances for merchandise. They don't want to reduce the ceiling lighting or the millwork furniture lighting. Does anybody know of any "tips" or "secrets" I can use to pass? Some hidden code...
  20. Evo

    Why Inadequate Lighting in Closets?

    Why do they always have such bad lighting in closets? I have a really large walk in closet with one tiny light fixture to one side of the ceiling. I can hardly see what's in there, much less tell the difference between colors like blue and black. Not to mention the shadows due to the weird...
  21. A

    Help with motocycle lighting project

    I am in the middle of a project, building an on road bike from an off road model and I am to the electrical system the coil I am getting is 200w I will be running probably 80w of lights and some led signals maybe 160w of lights if I feel the need to double the headlights , anyway my Question...
  22. C

    Lighting water on fire? I don't think so.

    Whilst perusing the Tube, I found this: What do you think? Did he actually light water on fire? I don't think so.
  23. J

    How much electricity does lighting cost compared to other electrical items

    Like a fridge, freezer, or washing machine? I was wondering if lighting would be a significant consumer of electricity of a regular house like say 10-20%?
  24. N

    Power Your Designs: Human-Powered Lighting Solutions

    design ideas ! hi guys I am new to this but i am enjoying it.I am trying to make a project on generating light from human power eg. if some one is running on the trade mill we can attach device that generate X no of bulbs for Y time.any ideas pls!
  25. rohanprabhu

    Lighting bulbs with magnetic fields

    This guy seems to have done something like that: http://gizmodo.com/361390/1301-florescent-bulbs-lit-solely-by-magnetic-fields Now.. what i was thinking is that.. how could he have done that? The power lines carry alternating current all right and it's a changing current, so it produces a...
  26. P

    Moving while lighting, will be induced current in me?

    ometimes people say that if you moving while lighting, there will be current induced in you, and you'll die, is it correct, and if so how the electrical circuit is closed? (They say if lighting strikes near you, from the electrical field, if you move, there will be induced current in you)
  27. T

    12v DYNAMO driving 5v front & 10v rear LED lighting + DIAGRAM

    Hi, I'm wondering how to drive front and rear lights off one dynamo. See diagram for current setup. Lights are hooked up to dynamo in parallel. The LM7805 and LM317 are voltage regulators which drop the voltage from 12v to 5v and 10v respectively. Currently only the headlight works, the...
  28. C

    How Can You Light Up a Small Christmas Bulb with Batteries and Wires?

    Hey... This is for a school projecct but i feel like its best fiting here... Well... look i need to lighg up a little light bulb(like a christmass, those little ones) but i don't don't know how, i can't use any plugs in the wall or anything... i was thinking on using some batteries and wires...
  29. DaveC426913

    Even lighting at an oblique angle

    DavesBrain Project 241a - lighting framed pictures I want to light a half dozen pictures in 5x7 frames in a display in the corner of my living room (this display will likely be free-standing, like a privacy screen), but I don't want http://www.ikea.com.sg/products/product_display.asp?id=2237"...
  30. S

    Why do Military Installations Use Red Lighting?

    hi all, I am a Physics Learner and have a following question: Why do secret military installations like plane hangars etc lighted by 'RED' lamps?Also the CCC rooms have red lights.Isn't it ironic that red color is also used as traffic signal because it is visible for the farthest distance...
  31. Z

    Does a Spherical Lighting Rod Provide Better Protection Than a Long Rod?

    i am not quite understand how a lighting rod work, and its relationship between the electric field around it. will the long rod have a better performance then the shorter one's? or maybe a spherical rod...
  32. B

    What is the physics of a lighting ball?

    I've heard of fire balls caused by lighting that float around for a while and can pass through a window. what are these?
  33. M

    Create Artificial Lightning: Tips & Fixes

    I read that lighting happens bcoz evaporated water contains a net negative charge and when it gathers in bulks (clouds) it would create a -ve charge large enough to turn air into plasma and therefore conduct electricity to the ground etc etc... So is it possible to boil water in a closed...
  34. V

    Physics Project Lighting a Match

    I need to create a Physics project that involves a 5 step process to light a match. I have the steps down but I am having trouble with successfully lighting a match. My original plan was to attach a match to a mouse trap and when the trap is released, the match would rub against the sanded...
  35. E

    How to determine appropriate lighting?

    I have to determine the necessary lighting for a currently dimly lit warehouse, and I don't really know how to go about doing this. What do I need to know in order to determine what type of lamps or how many fixtures, etc., are necessary? All I can tell you is that I think we're using 400 w...
  36. M

    Affordable Red Laser Beam: Tips and Recommendations for Straight Light

    Hope this is an apropriate thread to be asking this.. but I am curious if anyone knows a cheap way to get a straight red laser beam? I found this green laser pen on the net and it has a fluid light from source to point but they say the red ones simply don't have the technology or something...
  37. P

    How Many Watts Are Involved in Lightning?

    hi guys i want know how many watts does a lighting have? --------------------------------------------------------- (lighting=the power that exchange between clouds an earth) (im sorry about my english words becaus i don't speak english) thanks bye
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