Questions tagged [lighting]

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1answer
40 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
63 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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0answers
34 views

Voltage setup for lighting rig (mobile)

I'm trying to build a mobile rig with a series of powerful lights (LEDs, Infrared, UV). My question is concerning the nominal voltage requirements of my project. Some of the lights I want to use, due ...
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1answer
40 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
92 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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0answers
32 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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0answers
24 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
48 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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0answers
41 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
88 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
60 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
68 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
52 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
35 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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0answers
37 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 ...
1
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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
65 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
69 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 ...
0
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1answer
35 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
85 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 ...
2
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2answers
130 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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0answers
32 views

How to calculate a LED pixel's luminance?

if the maximum luminous intensity of a single LED pixel is 1.8 candelas, how to determine it's luminance? The LED pixel is an SMD 5050. ...
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0answers
33 views

How to calculate Energy Readings in DALI-2?

I'm reading the memory bank202 from a DALI-2 supported led luminary for energy consumption. When the lamp is on, I see that memory bank location 9 and 10 is increasing. But I couldn't understand how ...
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1answer
52 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
62 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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0answers
46 views

Do I need the old earth connector when replacing GU5.3 bulb fitting with GU10

I'm switching out a GU5.3 bulb fitting including the transformer with the newer GU10 fitting that no longer needs the transformer. On the old GU5.3 fitting there was a metal connector attached to a ...
1
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1answer
118 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
81 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
284 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
57 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
98 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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0answers
39 views

Emergency Lights Battery Backup

and thank you before hand for any help provided. Recently, I made this little Arduino project that is working very well! However, the 9V battery lasts only 24hrs (a bit more since I am using watchdog ...
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0answers
43 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
268 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
178 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
133 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
81 views

Thoughts on storing electricity 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 ...
4
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1answer
540 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
91 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 ...
0
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1answer
150 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
54 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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0answers
67 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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0answers
47 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
34 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
323 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
956 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 ...
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0answers
34 views

Travel Photography 3.5V 3,6-4,8A LED Lamp powered by power bank

I travel a lot for my work as a photographer. For this I'm building a custom full spectrum lamp. I have no issue running my build with a normal adjustable power supply from my studio. To be able to ...