Questions tagged [lighting]

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27 views

What are some sources to learn LED based exterior and interior lighting design for the aerospace industry? [closed]

I am trying to find sources to learn how to design exterior LED lighting for airplanes , aircrafts and helicopters. Something like this: https://youtu.be/bppYZq5fAtU I saw in the video that there is ...
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2answers
93 views

Trying to replace LEDs in lighting fixture - new LEDs just blink

A friend and I - both electronics hobbyists - figured replacing the blown LEDs in his home exterior lighting fixtures couldn't be THAT hard... (pause for all to say 'yeah, it's not straightforward you ...
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2answers
44 views

Need help with configuration of a touch sensing lamp project! [closed]

I am currently a design student in university, and am attempting to configure a large scale project for my final. The idea is that there would be a lamp, with one person holding onto either (wire? ...
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62 views

Quick simple car lighting circuit question

I have wired up the below circuit in my car and would just like to ask if there are any issues with this circuit. The lighting in this circuit is tapped into three wires from the car's ceiling light. ...
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1answer
69 views

Retrieving energy data from dali2 D4i memory bank (202) of a luminare

I'm trying to read the memory bank202 from a DALI-2 supported led luminary for energy consumption. it returns a value of zero. when i gone through the Dali part 252 energy reporting Doc. It asked me ...
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30 views

Can a solar cell based lux meter produce useful readings for ultraviolet light?

I was reading the question Safety Guidelines for Ultraviolet LEDs? about ultraviolet exposure, and realized that a solar cell can probably detect this, since solar cells can also detect visible light, ...
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1answer
49 views

230V Light switch to control intensity and drive two bulbs

I'm looking a way to improve a lighting solution. The idea : to use a basic electrical switch already present in my room wall (with Line switched by the toggle switch + Neutral not switched) to ...
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2answers
70 views

Wire ebike lights to main battery

I am newbe to this Forum and to ebike enthousiasm. Sorry, my english is minimal. I need to add front and back lights to my new E6100 Series Shimano STEPS driven ebike. I opted for lighting directly ...
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1answer
42 views

How to connect a mains 24Vdc and an Emergency 24Vdc supply to lights that should switch the mains supply off when the emergency feed is switched on

I am looking for a solution for some lighting that was installed recently. The lights are single LED downlights that are connected from a direct connection to 24Vdc through a constant current driver ...
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2answers
100 views

How can there be voltage across resistors in series when circuit is open?

If you have a circuit containing 5 resistors, and one of them gets damaged such that current can't flow through it, I assumed no current would flow anywhere throughout the circuit, and that the ...
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1answer
2k views

Why is my 50-600V voltage tester able to detect 3V? [closed]

I used non-contact voltage tester to test burned out Christmas lights. It says it can only detect in the range of 50-600V. One of the strings has 40 bulbs in series and none of the lights are burned ...
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36 views

Using an old 2 way switch in 3 way setup

i'm not an expert in electronics and i'm keen to get some guidance on the below... I have an old vintage 1-way (On\Off) light switch I would like to use as a 2-way switch to control a light from two ...
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1answer
54 views

What is meant by lightning dissipates through a vehicle's body?

I have read a lot of articles and other post relating to what happens when lightning strikes a vehicle or evening a building with metal. However, I cannot grasp one part. This is when lighting strikes ...
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33 views

5MM Blinking (Candle) LED replacing a White 5mm LED in a Solar Garden Light

I'm looking to replace the standard white LEDs I have in my solar powered garden lights with the same size yellow blinking (candle) LEDs. My garden lights use the ANA618. I know the blinking LEDS ...
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1answer
49 views

Can I wire a security camera into a switched lighting circuit?

I live in a building with a communal stairway. This has lights which are switched on each floor, controlled by a timer box which holds the lights on for 2 minutes after the push button is pressed. I ...
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42 views

Daisy chaining lights with I2C

I want to make some modular mood lighting. The idea is that there is one master in the chain (the one that gets turned on first) and the other lights can plug in to each other. Each light has a rotary ...
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2answers
122 views

Would connecting multiple light socket splitters together decrease lumens

Sorry if this is a noob question. I'm trying to build a very bright light by combining multiple light bulbs together with socket splitters. My thinking is simply to take three 7 in 1 light socket ...
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1answer
61 views

Will a string of 5W globe bulbs in patio survive the rain? [closed]

I have a string of 5W globe bulbs (G12) in patio. The bulbs are facing upwards. A few questions What will happen if: If I turn them on after it has rained and things are wet I turn them on during ...
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1answer
70 views

Please help me identify this LED from a Nuevo (HGH0242) / Horizon Lighting 5-pendant light fixture

This is an apparently failed LED from a 5-year-old Nuevo (HGH0242) / Horizon Lighting 5-pendant light fixture in my house. Only this one has failed - all others still work. It measures about 11.7 mm ...
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2answers
62 views

Safely wiring two strands of halloween LED string lights in series?

I have ~20 ft of perimeter to cover and it seems everything sold online is sold by ~10 ft lengths. I've decided I want to buy two strands of these lights and connect them start to end. What ...
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1answer
43 views

Ceiling lamp, 14 gauge, not 18 gauge

I've Googled this very hard, and I'm not coming up with any good answers. This question seems very simple: Are there ceiling lights/lamps in the market that have a 14-gauge wire for the black/white/...
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39 views

Pinout of metal halide lamp

I've bought a few metal halide lamps (specifically Osram HCI-TC 70 W/830 WDL PB) and electronic ballasts for them to have really bright light in my room in winter (like this guy). The ballasts' lamp ...
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1answer
29 views

powering multiple LED panels

I have four 50W AC 220V LED panels I'd like to rig to light a work area. I bought a 200W step up / down transformer to test with and it powers a single panel fine. I have two questions-- first, will ...
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4answers
66 views

How can you power a device using a relay when the device uses power cables to change its operating mode?

I am working on a custom automative install on my car. I have a few lighting fixtures that change colour based on which power +12v wire is being used. For example, each lighting fixture can display a ...
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1answer
76 views

How does a USB-C to Lighting Adapter work / How to replace them? [closed]

So, I am fairly new here, and to be honest I have no clue if this is the right place to ask. I am currently thinking about replacing a Lightning port with a USB-C port, just for power supply. At first ...
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1answer
82 views

COB LEDs array in parallel driving circuit

I need to connect half a dozen COB LEDs (36V, 300mA). I can only connect them in parallel, not in series, because of wiring considerations. For them to all be at the same brightness, my understanding ...
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2answers
87 views

Three light switching (not three way)

I have a small situation, A = Outside light, B = Porch light, C = Inside Light. I would like to switch A + B together but not C, and then B + C together and not A Is there a relay or something that ...
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2answers
149 views

Thick spiral, faint orange glow - what type of old bulb is this?

In a museum in Germany, I saw this lightbulb-shaped device mounted in a E27 mount, seemingly on 230V AC. It contained a thick black spiral, with a visible gap at the top, emitting a soft deep orange ...
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1answer
109 views

DALI Lighting (IEC62386-209) and Command-In-Between

Good Afternoon, I'm having some trouble understanding IEC62386-209 section 12.7.3, which involves sending an "ENABLE DEVICE TYPE 8" command to DALI Control Gear prior to sending an extended (DT8) ...
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1answer
72 views

Help Troubleshooting Relay for Vehicle Offroad Lights

I am wiring up 2x 55W Halogen lights and 2x 100W Halogen lights on my '01 Subaru Outback. I want all 4 lights to come on when I turn the switch on. I created the wiring diagram which I followed during ...
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1answer
210 views

Motion triggered battery powered dimmable COB LED light

My view on life, in any field, is not to produce more but to consume less. Everybody told me this is a very eccentric weird mentality. Perhaps they are right. Nevertheless I have to build my project ...
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1answer
83 views

What determines the colour temperature of a bulb?

There are various bulb products in the market, the temperature of the bulb determines the colour of the light emitted by the bulb. For example 3000K is warm white (yellowish) 6000K is daylight (...
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1answer
323 views

How much power is required to run LEDs?

I'm living off the grid in the bush in a hut I've built since this whole virus drama. My only issue is I'm not really good with electrical stuff. By this I mean I have a few basic solar set ups that ...
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1answer
58 views

How to power 83V UV-C germicide tube?

I'm currently working on a UV-C germicide lamp, and among the things I have to do, is to drive four 83V OSRAM 21283 G55T8/OF 55W G13 T8 Tubes. Here's a link to the tube, and the datasheet. My ...
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2answers
179 views

Do these fluorescents contain ballast and starters?

I will probably buy some used fluorescent lamps to grow vegetables indoors for my project. As I am aware fluorescent lamps need ballast and starter. I don't have experience with fluoresent lamps and ...
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45 views

How did an LED go from being a point source of light to an extended source?

A night light with an LED under a dome screen projected a sharp image initially, but a blurry image after the first night. The screen appeared to be undamaged, this led me to believe that the LED ...
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1answer
368 views

How do I operate any mercury vapor bulb and/or a metal halide without a ballast?

I have seen some youtube videos of some folks operating mercury vapor, metal halide and high pressure sodium bulbs on a incandecent bulb to limit current, but they never explain how. I can't find ...
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1answer
180 views

Size of glass on incandescent bulb

I was buying light bulbs for a load bank for work and it occurred to me...what determines the size of the glass that goes around the filament? It seems somewhat arbitrary since it's a vacuum so it ...
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2answers
136 views

Brightness of LEDs

I am currently in the design phase of building a digital clock (about 2ft by 4ft in size.) It should be fairly visible from a considerable distance (about 100 ft) and visible during the day. I am ...
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3answers
100 views

What methods are there for storing electrical potential energy in water vapor? [closed]

for an engineering class I had to create an electrical energy storage device and I began thinking about thunderstorms (I think it was a cloudy day) and how they create lighting. I know it's not ...
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1answer
558 views

Do dead CFL or LED light bulbs consume power and is it safe to leave them mounted?

Do burned-out CFL or LED light bulbs consume power when the switch is on? Is it safer to keep them in their sockets, removed or slightly unscrewed so the bottom center contact isn't touching? I ...
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3answers
2k views

Why do LED headlamp bulbs need active cooling?

I decided to install LED headlamp bulbs in my car in the hope that I can avoid replacing bulbs every year. I was quite surprised to find that I can't fit replacement bulbs in my car due to the bulbs ...
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2answers
115 views

60VAC measured when light switch is off

I'm replacing a fluorescent ceiling light with an LED fixture. I removed the entire chassis, ballast, etc, and now I'm just left with the hot/neutral cabling (no ground wire available). I wanted to ...
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1answer
162 views

Cheap chinese rice lights [closed]

I was shocked to see how cheap the chinese rice lights are! They even come with a controller attached with them, which allows you to change the lighting pattern. I wanted to know what could they have ...
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2answers
58 views

Can I keep half of an addressable led strip on?

If I bought some WS2811B led strips (300). if I ran them across a room is it possible to make the first 150 LEDs or so stay on, and the last 150 off?
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68 views

What is the off-white powdery material found at the base of GU5.3 light bulbs?

I've noticed most GU5.3 light bulbs, both halogen and LED, contain a granular material at the base. There seems to be considerable variation in how much of this powder is present, even within the same ...
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48 views

Is there a physical (electronics) difference between Hue White and Color and Hue White Ambiance bulbs?

I'm curious if anyone knows if there's a physical difference between a Philips Hue White and Color bulb, which allows the user to set a complete range of RGB colors including white light color ...
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1answer
35 views

Directly wire inverter to switches/lights/etc [closed]

I have a 12V deep cycle marine battery that is charged by a 20W solar panel. This works well. However I would like to use the battery to run two 120V 170mA 15W LED lights in a shed. So as I understand ...
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1answer
416 views

LED light bulb in series or parallel?

I have been exploring how LED light bulbs work and the circuit inside of them. One particular question I have is how the lights are actually arranged? LIFX, for example, has 4 different types of LEDs;...
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2answers
1k views

Edge-lit LED panel best materials? [closed]

I'm trying to replicate the effect of this LED panel I found at Home Depot with a different set of LEDs and use a differently sized panel. It's basically just a diffused light that mimics a window or ...