Questions tagged [incandescent]

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8 answers
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Using 110 Vac incandescent light bulb at 220 Vac with a series diode

I have a 110 Vac incandescent light bulb but I need to use it in 220 Vac. If I add a diode in series with the bulb, the RMS power is the same as before but the peak value of voltage and current is ...
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  • 11
0 votes
2 answers
72 views

Christmas lights in series with one broken bulb

I read this about Christmas mini-lights in series: "When one bulb's filament breaks, current stops flowing, so the remaining lights go out, and the full 120V appear across the broken filament. ...
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-3 votes
1 answer
71 views

Replace incandescent lamps with LEDs in vintage christmas lights [closed]

I have vintage Christmas lights with 20 incandescent lamp connected in series. They are connected directly to AC plug (220V here). UPD: Original bulbs are 13.5V 160 mA (similar to https://www....
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4 votes
2 answers
767 views

How do the non-circuit old Christmas lights flash?

I have a 80's Christmas incandescent light string without any kind of electronics. They are static until you replace one normal bulb with one marked bulb. It seems to be that the marked bulb (that ...
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2 votes
4 answers
144 views

Is the luminous efficiency of a 5000 K incandescent greater than that of a 3000 K bulb?

The color temperature represents the color of light emitting from an ideal black body, when heated to said temperature in kelvin, and how an incandescent bulb emits light is close to a black body. ...
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3 votes
0 answers
128 views

Why does my lamp say "Use max 60 watt Type A OR max 10 watt LED?"

I'm really intrigued by the label on a new lamp. It says: Caution: To reduce the risk of fire, use MAX 60 watt type A lamp OR use MAX 10 watt self-ballasted LED lamp or lamp adapter. Now I didn't ...
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  • 163
-3 votes
1 answer
194 views

How Many Ohms is an Average Incandescent Lightbulb? [closed]

The title says it all... How many Ohms is an average incandescent lightbulb? EDIT After a few people making me realise that my question is kind of imprecise, here is what the question really asks: If ...
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  • 3
0 votes
2 answers
62 views

Putting LED near incadescent light source on lava lamp

I am currently trying to modify a traditional lava lamp, to change the colour of light it emits, by placing an LED strip somewhere around the body, so it also lights the inside of the lamp. My lava ...
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  • 1
0 votes
1 answer
102 views

How to check voltage and wattage of an unmarked incandescent bulb?

I've salvaged 160 incandescent bulbs from fairy lights. They were connected in 80 bulbs in series then connected in parallel. They were plugged into 220V. How do I measure the voltage and wattage of ...
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1 vote
1 answer
113 views

Using Arduino PWM to drive an incandescent lamp

I'm trying to drive an incandescent lamp using Arduino Leonardo PWM, the incandescent lamp has the following electrical specifications: peak voltage=1.4 V (max) peak current= 1.14 A (max) peak power = ...
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-1 votes
1 answer
39 views

Does an equivalent LED bulb for an "inner bulb of an old incandescent E14 bulb" exist? [closed]

Update: question solved: The bulb is a Gy6.35 question I have an old lamp with an incandescent bulb. I would like to replace the incandescent bulb with an LED bulb, so I disassembled and photographed ...
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  • 99
0 votes
1 answer
131 views

Question about purely resistive incandescent lamps put in series and fed double normal voltage

I am curious about how and why if you take 2 purely resistive incandescent lamps (light bulbs) that are rated at 40 watts and 60 watts, both 120V AC (RMS) ratings, if you put them in series and feed ...
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  • 238
16 votes
9 answers
5k views

Cheap and safe way to dim 100+ 60W Incandescent bulbs

For my wedding reception, we are building ~25 lighting fixtures with 4 bulbs each (fixture per table for dinner). For aesthetic and budget reasons, these are 60w "Edison-style" bulbs which we want to ...
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0 votes
1 answer
511 views

Car Battery Charge Indicator Replaced with LED then Dimly Lit When Off

I think I should be able to grasp something from this question but I'm not sure if my case is the same or not. Would be great if I can get enlightment on this. In my case I'm replacing incandescent ...
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2 votes
2 answers
1k views

Why would an incandescent bulb produce a bright flash when burning out?

A typical way of an incandescent bulb to burn out is with a bright blueish flash and often an audible sound and (very rarely) an explosion of the bulb glass. Wikipedia says the following: Since a ...
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0 votes
2 answers
387 views

Parallel Incandescent Bulbs and Resistors

I have built the circuit in LEDs and high currents and it works well - when the switch is open, the incandescent lamp lights up but the LED doesn't. When the switch is closed, the lamp goes out and ...
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  • 97
1 vote
1 answer
124 views

LEDs and high currents

In smartening up my doorbell I've been playing with my illuminated pushbutton and have fallen into a bit of a rabbit hole. The doorbell normally: simulate this circuit – Schematic created using ...
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  • 97
1 vote
1 answer
181 views

Matrix of small incandescent lightbulbs - problem with buzzing

I am prototyping a circuit for controlling matrix display of small incandescent lamps with Arduino (each lamp is 6.3V 0.3A). I designed the circuit in Yenka and built it. It is composed from 3 types ...
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2 votes
1 answer
164 views

Are the 2 terminals of an incandescent bulb lamp equivalent?

Compared to a resistor, which has 2 equivalent terminals, does an incandescent bulb lamp also have equivalent terminals?
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-2 votes
1 answer
118 views

Still 1000 hours of lifetime [closed]

I am familiar with the famous Phoebus cartel of the companies Osram, Philips and GE, but this cartel began its operation in 1924 and lasted at most to the World War II. In the second half of the 20th ...
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  • 21
0 votes
2 answers
60 views

Replace in-series incandescent lamps in a makeup mirror with LEDs

This is my first post here. My wife uses a makeup mirror which has 10 x BA9s in series. Each lamp is 3W 24V and since we are in Europe they run on AC 230V nominally (reading off a multimeter is ...
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  • 113
0 votes
1 answer
1k views

Resistor and Incandescent Lamp in Series

I’m new to electronics and am trying to ground myself in basic concepts. On my test circuit board I have a 5.08V power supply, a 200 ohm resistor and a 1.5V incandescent lamp in series. The voltage ...
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2 votes
1 answer
250 views

Flickering 230VAC Halogen dimmer

After using Stackexchange for several years now for solving all my Python, LaTeX, math, electronics, engineering and life questions, I have finally come up with a problem I cannot find an answer to. I ...
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4 votes
1 answer
274 views

Using a vintage button bulb saver be used for CFL or halogen lamps?

Recently got a big box full of vintage tools and electrical stuffs. I came across this strange looking (seems vintage by its looks) button device. Its the first time I came across it.I googled and ...
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17 votes
3 answers
3k views

Light bulb burns out -- why there is an arc in the switch?

I use light bulbs (common incandescent) in the room and they burn out periodically, ca. one bulb in 4 months burns out. Very often, exactly at the moment when it happens, I see an arc (blueish light ...
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  • 277
0 votes
3 answers
150 views

Led bulbs Vs CFL and incandescent bulbs [closed]

Recent Innovations forced mostly by newer and stricter government regulations have brought us through extremely unreliable CFL light bulbs from the old incandescent light bulbs to these very expensive ...
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-1 votes
1 answer
689 views

How to secure a good safe mode when MOSFET burns open circuit

I am working on a circuit like this one: In the circuit the PMOS Q1 is normally closed, and all energy from the source V1 runs through the resistor R2. If the photo sensor D2 detects that the LED D1 ...
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0 votes
2 answers
1k views

Can I connect two 6V 25W bulbs in series to a 12V supply?

I've two GE 4510 6.4V 25W tractor bulbs with me. Unfortunately, the only power supply I've in my possession is capable of outputting only 12.02V. Can I connect the two lamps in series to the 12V ...
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0 votes
1 answer
742 views

Incandescent bulb for 220V vs 110V and difference of their resistance?

I know that 40Watt,110V incandescent bulb has about 302 ohm resistance of tungsten filament (which is metal and of course have low resistivity) comparing it to 40Watt, 220V bulb which has about 1200 ...
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-1 votes
1 answer
114 views

Flicker flame bulb

According to this thread, flicker flame bulbs are neon glow bulbs. Consequently, they do not generate light through incandescence. However, I have also seen bulbs marketed as flicker flame ...
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2 votes
2 answers
141 views

Sign on range hood light switch says "incandescent or resistive 120V AC Only"; does this mean no CFL or LED?

The switch includes a standard-looking rheostat; I have read the issues around using dimmer switches with conventional CFSs. I don't value the "dimmer" function on the hood -- just want to see the ...
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0 votes
3 answers
233 views

Operating a 60W incandescent bulb

I want to dim a 60W incandescent bulb using PWM on a MCU. The bulb is rated at 220-240V 50-60Hz at 60W. I am planning on using a optoisolater connected to the PWM pin. I want to run it on DC, so since ...
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  • 187
0 votes
2 answers
7k views

Bulb replacement in a car 12V 60mA vs 14V 65mA

The climate control in my car needs to have some backing lighting bulbs replaced. Can I use a 14V 65mA bulb instead of the 12V 60mA bulb that is suggested by other people who have replaced these ...
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0 votes
1 answer
1k views

SSR not switching dimmed load

I have a system where there is a "master dimmer" (an 800W dimmer designed for household lighting). From that master dimmer, I have a few SSRs switching 40W incandescent light bulbs. The idea being ...
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2 votes
2 answers
36k views

LED light bulbs flicker when switched off - where does the energy come from?

Outside my house, at the front, I have a set-up of 3 lights attached to the wall. These lights can be switched on using a switch inside the house. Furtermore, they are attached to an infra-red sensor ...
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  • 123
0 votes
2 answers
609 views

Difference between incandescent/fluorescent/LED wattages?

If the numbers on the 'light output' table at the bottom of this page (here) is correct, and if I have a lamp (like this) that has a maximum wattage of 60 and takes incandescent bulbs: Does that mean ...
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2 votes
2 answers
208 views

Electric light bulb burns out

Why electric light bulb more often burns out when we switch from OFF to ON our wall switch, but not during regular work? What happens to it so it burns?
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  • 503
2 votes
2 answers
2k views

How many lumens does an incandescent halogen bulb provide?

I got my hands on an old slide projector (the kind that projects cel slides onto a wall). The light source, is a 24V, 150W incandescent halogen lamp. As a little pet project, I'm thinking of ...
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  • 905
3 votes
1 answer
19k views

How to add lumens

I have n bulbs of luminosity k in fixture a. How many bulbs of luminosity l do I need in fixture b for the brightness of a to match the brightness of b? Specifically, I'm wondering how many standard ...
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  • 131
1 vote
1 answer
195 views

30x Incandescent light bulb in parallel ? + dimming

I'm trying to connect 30x small incandescent light bulb in parallel (1.5v / 300mA). But I'm having some issue designing the supply and dimming circuit. Does it just work like LED's for the ...
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  • 57
3 votes
2 answers
12k views

Trouble converting 12VDC incandescent to LED: lack of resistance

I'm converting two, independent, incandescent bulbs (OEM 212-2) fixtures to use LEDs for automotive map reading. Each incandescent bulb (12-volt/system) measures 1.5 ohms with a meter; however, there ...
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0 votes
1 answer
126 views

DIY power 230v filament bulb off grid [closed]

I need to power a 230v bulb off the grid via solar power. Typically, I would have solar panels that charges some 12v dry/wet cells. These cells will have to supply an inverter that would power the ...
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  • 123
0 votes
1 answer
481 views

Accidentally soldered in 12v 60ma bulbs in a 14v 95ma circuit - dangerous?

I was replacing some lights in my car's HVAC control box, and I used 12v 60ma bulbs (link), and after reinstalling it in the car (bulbs are working), I was doing some Googling and noticed that some ...
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0 votes
2 answers
640 views

Touch dimmer with low voltage transformers, needs incandescent to work? Updated!

I've looked extensively about this topic, and can't find any answers. Hopefully someone on here can help. I live in Texas and have 120V power in my house. I'm using a lamp touch dimmer to dim two ...
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1 vote
2 answers
639 views

Do parabolic reflectors in globes increase the brightness of the filament's light, or just 'spread' the light?

If you compare a traditional 60W incandescent globe with the same filament specification as one with with a parabolic reflector built into the globe, does the (usually) aluminium reflector actually ...
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1 vote
2 answers
539 views

How to drive miniature incandescent light bulbs with a micro controller?

I have an assortment of minuature (~2.5mm diameter) light bulbs that I'd like to use for a retro-looking project. Driving LEDs is fairly easy with a micro controller, if the output is too weak, I'd ...
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  • 905
4 votes
3 answers
2k views

What makes an incandescent light bulb run out?

What is or are, the most likely and common ways - the weak links in the chain (including I assume poor electricity wiring / configured housing) - that cause a traditional incandescent light bulb to ...
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8 votes
1 answer
14k views

Replacing incandescent bulbs with LEDs, unexpected behavior

I have an over-the-stove microwave/hood vent combo with 2 adjustable-brightness lights. The lights appear to be 12V lamps with a G4-style connector, and they burn out too often. I decided to go with ...
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2 votes
2 answers
7k views

How to determine required voltage of a lightbulb

I have a bulb here that has no markings except it says 25 watts, I just wanted to know what voltage does it need to power up. Our standard voltage here is 220 V, I tried plugging it on a 110 V ...
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4 votes
1 answer
2k views

Will a incandescent burn out if you leave them on forever?

We've all had a time or too two that when you really needed light, and I mean need it immediately, and you flip on the switch, and with a pop and a bright flash, your incandescent is toast. However, I ...
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