Questions tagged [lighting]

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1answer
19 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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0answers
28 views

Aquarium LED light not working?

I was wondering if anyone could help me. I have an Aquamaxx Prism LED light for my aquarium (http://aquamaxxaquariums.com/lighting/prism/) it is the 24-36 inch with 124 LEDs in three channels. After ...
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1answer
36 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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25 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 ...
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1answer
33 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
80 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
276 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
49 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
70 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
37 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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42 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
111 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
170 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
128 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
79 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
502 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
1k 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
51 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
91 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
46 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
66 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 ...
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0answers
45 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
32 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
185 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;...
4
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2answers
740 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 ...
0
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0answers
33 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 ...
0
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1answer
156 views

HDMI/USB Powered Lighting

Alright so a little vague title but here it goes. I'm interested in powering some 5v LED strips with an HDMI cable. I have no idea if this is even possible, I'm lacking knowledge in electronics. My ...
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2answers
110 views

Lighting socket for LED only?

There is this socket for a light bulb, and it says LED only. Why is it like that? Is it just for power limitation (not to exceed power,) because LEDs take less power, or is there another reason?
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1answer
52 views

Uneven LED Lighting Wired in Series

I’m struggling with six 11.5-watt LED cans wired in series. With a 75-watt incandescent at the end, the other five seem to function properly, though the incandescent is dull. With an LED in its place, ...
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2answers
3k views

Soft Touch Lamp Turning on by Itself [closed]

This has been driving me crazy for several years now -- my soft touch lamp has been turning itself on most mornings. Some details: It is definitely tied to sunrise/dawn, as the time each day varies ...
4
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2answers
826 views

Why is one lightbulb in a string illuminated? [closed]

I noticed that in various strings of lights only one was illuminated. It seems implausible that all but one out of several hundred blew. What caused this and why did this particular light turn on?
1
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1answer
39 views

Powering same LED strip from 2 drivers - diode?

So I'm looking at adding some LED mood lighting to our bedroom. End game is to have a single LED strip controlled by 2 different switches Currently, I have 2 switched 240V AC outlets, one either side ...
2
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1answer
59 views

LED selection for my application

I need to select LED/LEDs for a light source in my project. The requirement is that the light source should approximately be able to project light beam of 1.5m diameter on a surface, from a distance ...
2
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3answers
176 views

Off grid LED solar lighting without batteries

I have 2 COB LEDs (12-14V DC, 50W, I think with 3,75 A in data sheet). I need to run them with a solar panel, it should only run when there is sunlight no batteries needed. Using a 270W panel (open ...
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1answer
90 views

Trouble getting AL8861 LED Driver to illuminate LEDs

I am trying to get a AL8861 LED driver hooked up. Right now I've connected it to a single LED (this one) to test (see circuit below). I eventually intend to connect it to a DAC5578 Digital to Analog ...
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0answers
105 views

LED Light changes color on being turned on/off simultaneously

What type of circuitry/driver is present in the lights that change color on being turned on/off ? I have a LED tube light which cycles through 3 modes (i.e. color 1, color 2, both color). Its circuit ...
0
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1answer
126 views

Two lights, two switches… one problem!

I'm looking to set up an AC 240-volt lighting circuit consisting of two lights (let's call them L1 and L2), a standard switch (SW1) and a PIR. The goal is to have SW1 turn on only L1, but if the PIR ...
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1answer
64 views

How to calculate the Short Circuit current of a small DC circuit?

I need to do a short circuit test for my DALI slave device. I have observed a maximum load of 140W at 210V-rms (Load current = 650 mA , PF = 0.975). I have to do a short circuit at the load side and I ...
2
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2answers
118 views

Why a CFL lights up when I touch it?

When there is a very low voltage (AC), even for a compact fluorescent lamp (CFL), it glows very dim (orangish in color) at the beginning of the glass but when I hold the glass just for a second, it ...
0
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1answer
154 views

Magnetic ballast with g23 bulb with capacitor

I am trying to make a UV-b photo-therapy light and want to make sure I'm understanding the circuitry correctly-so i don't hastily burn a $50 bulb. Im using a Phillips PL-S 9W/01/2P (link here). It's ...
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2answers
97 views

compact fluorescent lamp noise on digital signals

The answers to this question about CFLs (compact fluorescent lights) in an electronics lab indicate there is some concern about the presence of electronic ballasts and CFLs in connection to radio and ...
1
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1answer
720 views

Fairy Lights Wiring

I'm not sure if this is the right place to post this but if anyone can provide any help it would be appreciated. Please keep in mind I am no expert when it comes down to power and electrical stuff I ...
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1answer
73 views

24V - 48V standard for lab. tips

I'm new to home improvement. Here's my question. I've got several led strips for ~24V each and I've formulated a circuits to make them work from a 48V outlet at a lab psu. Approx. 16 ampere ...
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0answers
353 views

Autofeel light bar mod [duplicate]

I purchased an Autofeel 30 inch light bar that has 4 rows of LEDs. I have seen this bar advertised under a number of different names, but as far as I know it's the only one with 4 rows of LEDs (they ...
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1answer
68 views

Light bulb and battery

I have a question about a project I am working on. I am making a spotlight and the battery I have is an 18650 battery rated for 3.7 volts and 2000 mah. The light bulb is 1000 watts. My question is: ...
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1answer
145 views

High(er) Current AC Flasher Circuit

I'm trying to develop a flasher circuit for an aircraft warning light like the one shown at https://flightlight.com/products/obstruction-lights-controls-faa-l-810/. The light will be powered with ...
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2answers
156 views

1-wire fairy lights

I have here some fairly lights. It's a string of coloured LEDs with a transformer and control box at one end. The control box lets you select a bazillion different lighting patterns. (Presumably the ...
3
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1answer
358 views

Choosing the right transformer to replace batteries?

I have an idea for a hack I'd like to build, but I need some help figuring out the right transformer. Let me know if there's a better place to post this sort of request. I have some exterior LED path ...
0
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1answer
339 views

Wiring 2 separate PIR’s to an LED Floodlight

If possible can someone please confirm that this would work? I want to place a waterproof box on the front of the house, next to this I will put an LED floodlight (without PIR), I then want to put 1 ...
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2answers
422 views

Philips 9 W luminaire quotes 7 A for 300 ms inrush!

In his answer to Will repeatedly turning a light bulb on and off damage it? @Bradicul stated, An example of inrush current is an LED downlight fitting with 9 W (0.0375 A at 240 V) will have any ...