Questions tagged [lighting]

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1answer
247 views

Dimming A/C Lighting by Microcontroller

I have a question regarding A/C lighting for IoT just basically where to go for the information/parts I need. I want to control the lighting in my bedroom/bathroom via IoT devices that will act as a ...
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2answers
68 views

LED spotlights in soffits [closed]

I am looking into buying some 5W LED 3000k GU10 spotlights with a rating of 450 lumens, for my gypsum soffits. The only part which is confusing me is what viewing angle I should get. I have found a ...
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1answer
1k views

How can you make a light source brighter?

I am about to begin to work on an electronics project that involves the output of red light. After playing around with a bunch of LED’s, I realize that red and yellow are the weakest as far as “...
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2answers
57 views

Exposed bulb/wiring project [closed]

Apologies if this is the wrong exchange. I would like to start a home project, in which screw-in bulbs are left mostly exposed, and connected to semi-flexible wire. Something similar to this: A ...
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2answers
45 views

timed lighting button working principle

In the building I live, the hallway lights can be turned on by pressing any button that are scattered around the building, and all the lights will go on for a given time. I'm pretty sure that its ...
2
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3answers
6k views

Wiring a bunch of micro LED fairy lights to a single power source in parallel

I want to create a cascade effect using the wire fairy lights, like in this photo . What would I need to accomplish this? I can find the coils of lights for cheap online that use battery packs, but ...
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1answer
111 views

Basic electric/wiring questions resources

I have a 12V DC motor that I want to power alongside a 40 Watt incandescent bulb (I might find an LED bulb that works aesthetically).  I need to run a single cord to power both.  Preferably with a ...
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1answer
129 views

Powering a low voltage device from a two wire light circuit

I am about to embark on a home automation project, but I'm having trouble finding Wifi based IoT devices which can be powered from a standard two wire light circuit. The idea is to replace light ...
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2answers
60 views

How long will the batteries last when hooked up to this light?

The light being used is here: https://www.amazon.com/Germicidal-254nm-U-shape-150mm-Purification/dp/B01CV2W12E Lamp Current: 5.0mA Wattage: 8 watts It will be hooked up to 2 AA batteries in ...
2
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1answer
265 views

How can we power Christmas LED lights without mains supply

I have read the other thread 'Best way to power Christmas lights without nearby outlet' and my question does differ. We have a Christmas Tree which sits in the middle of our Village Green every year. ...
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0answers
702 views

4 bulb Ballast only lighting 2 bulbs

I have a six T8 Fluorescent light fixture. The 2 inner bulbs are powered by a 2 bulb ballast GE232-120RES-DIY, and the 4 outer bulbs, 2 on each side are powered by a 4 bulb ballast GE432-120RES-DIY. 2 ...
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1answer
479 views

Power Factor Correction Circuit (LED lighting)

I've been researching how to design power factor correction into an agricultural LED lighting system. My client requires at least a 0.95 power factor. I'm planning to use PWM controlled buck ...
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4answers
4k views

Are LEDs in modern streetlights usually pulsed? If so, roughly what frequency?

I can think of some reasons why modern LED streetlights would likely be pulsed; Efficient voltage conversion starting from line voltage would likely include an AC or switching step higher than 60 Hz....
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1answer
352 views

Requirements for dimmable LED driver

I bought a new LED aquarium light and the driver that came with it is not working. I want to buy a replacement driver but I need a better understanding of the driver requirements before I can make an ...
2
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5answers
17k views

Full Spectrum LED(400nm~840nm) vs Grow Light LED (RED+BLUE)

I'm planning to buy lights for my planted aquarium tank. After a small research I found that regular lights are not suited for growing plants. Beacuse they need BLUE for Leaf Growth and RED for Stem ...
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2answers
354 views

Does color rendering index increase with brightness?

I've been reading about LED strips and thinking about switching to those from my serial incandescent lamp setup, and I can't figure out if CRI (color rendering index) is tied to a certain standard ...
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2answers
240 views

Power Distribution to Greenhouse LED Lighting

I'm working on designing a custom LED lighting control system for an agricultural research project. This involves supplying significant amperage to high power LEDs distributed over a wide area (e.g. ...
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5answers
7k views

LED lights wired in Series will not light

I have a pack of simple LED lights that I planned on wiring in my boat for cabin lights. I installed and wired them all in a simple series circuit. Power supply connected to switch, switch connected ...
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1answer
61 views

LED bulbs or LED downlight? [closed]

Correct me if I'm​ posting this in the wrong sub. I've never really played with LED lighting, but I've seen there are two types, bulbs and down lights. While the bulb type is more common as most of us ...
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1answer
204 views

Big picture: Ceiling LED control [closed]

I have been looking at ceiling LEDs for a while; I am owner-building a house ATM, and "wondered" how I can control the ceiling LEDs -- most 9-12W, probably 30-ish of them; in 3-4 different zones. ...
1
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1answer
118 views

Street Lighting Circuit Analysis

1- How does a typical street lighting circuit look like? (for 230V/50Hz, with details) 2- Without having the network plans or knowing anything about the topology of the circuit, is it possible to map ...
3
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2answers
182 views

Multiple lights with button that turns one on at a time [closed]

I am an artist trying to make an installation but I'm not too familiar with electrical work. I want to have multiple light bulbs wired to one button. Each time the button is pushed one light bulb ...
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0answers
76 views

Does a 20W bulb “overdrive” this transformer?

My daughter's IKEA reading light has/had a 12V 20W bulb with a transformer that listed that it output "11.5V ~ 10-20W 60Hz". The transformer stopped working, and I can't find a replacement available ...
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3answers
2k views

How Is Intensity of Blue Light Measured?

As a hobby project and to help solve issues getting up early in the morning (specially given that it's winter and the sun isn't up until long after I am) I'm trying to find a bright blue light that I ...
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2answers
616 views

How to vary DC (0-450mA) current using Arduino output voltage(0-5 v DC)? [closed]

I want to vary output DC current(0-450mA) Of LED driver keeping voltage constant using arduino output voltage (0-5 Volt) is there any IC or current regulator operated on arduino (0-5 volt )i.e at ...
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2answers
517 views

Strange light bulb phenomenon

Let me explain. My son has a small typical night light that occasionally will go out, even if the bulb isn't dead. Usually I'll tap on it repetitively or shake it to get it to work again. When I ...
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1answer
130 views

12v low power, high brightness solution - urgent

I need to quickly come up with a way of lighting a trade show booth from a 12v marine battery for 8 hours. My original idea to light the booth was to use a power inverter hooked up to an 80Ah battery ...
2
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2answers
182 views

LED lighting that lasts longer than me [closed]

My research has indicated that failure in LED lighting (incandescent replacements) results from failure in the support components rather than the actual LEDS themselves. How can I build and/or modify ...
1
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1answer
115 views

What are typical track lighting track profiles used in Europe?

In the U.S., the typical track lighting track profiles are known as "H", "J" and "L". Their cross-sections can be easily found by googling them. Are these same cross-sections used in Europe? If not, ...
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2answers
296 views

Making a 5v 12v and -12v PSU [closed]

I'm trying to make a PSU for a Zero88 Juggler lighting desk (as ours has been misplaced and a new one is £70) and am struggling to find a transformer to be able to power it. The pin out on the back of ...
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2answers
2k views

Car interior light with multiple “triggers” - 12V DC power

trying to add some lighting in the foot wells and under the seats in my car so that when someone drops something down there in the dark, it's not something that (at least not every time) requires ...
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1answer
67 views

Converting -48 VDC to +12 or +24 VDC 10 Amps or more

Good day, I would like the simplest way to reliably convert -48 VDC (Telcom DC Plant -42 through -56) to either +12 VDC or +24 VDC, the crux is I need at least 10 Amps. What I am trying to do is ...
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2answers
81 views

How to switch yard lights without ending up with a really long circuit

We're planning to install some area lights in the farm yard, and want to be able to turn them on from the house. This is simple enough with normal house switches, but I'm concerned that the overall ...
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1answer
126 views

L.E.Ds bright enough for stage lighting?

Can anyone tell me what power level one would need for LEDs meant to light stages, or point me at how to figure that out from product descriptions? Edit for more info, I'm wanting to make wide throw ...
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3answers
321 views

Can I use ethernet instead of DMX for DIY led lighting?

I've read that while most pro-lighting is uses dmx, some intelligent lighting rigs use ethernet. I'm interested in building some MCU controlled L.E.D. footlights for my stage show, and currently know ...
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2answers
128 views

How do I remove the excess wires from this 2/3 way lighting switch?

I have two sets of lights in my bedroom. There are also two light switches. One double light switch is by one door, and turns both sets of lights on or off (one switch does one set, one does the other)...
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2answers
19k views

Best way to power Christmas lights without nearby outlet

I want to power Christmas lights (without a nearby power outlet) for at least 2 hours and was wondering how to go about it. The lights run on 120V AC and draw .34A per strip (about 40 watts) and I ...
0
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2answers
514 views

Smooth and no-flickering dimmable light source

My goal is to record a video with a varying intensity light source. No flickering at any frame rate (frame rate 30 60 120 240) while watching frame by frame, not human eye. Smooth dim level Any type ...
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0answers
100 views

Commercial 1.5m / 5' LED light fitting parallel LED arrangement

I am reviewing LED light fittings for an industrial premises refit. As with most of the experienced users on this site I like to understand what I'm purchasing and have opened up a sample fitting to ...