Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [incandescent]

58 questions
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3 answers

Why are lightbulbs considered resistive load?

A lightbulb (a plain old incandescent lamp) is typically brought up as an example of resistive load. Yet the filament is actually made of several feet of very thin wire cleverly coiled to form a filament which is about one inch long. Clearly…
sharptooth
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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 flash) in the switch, so the bulb always burns…
Mikhail V
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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 dim in order to give a cozy, intimate feeling .…
JackTraore
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1 answer

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 LED to reduce the maintenance. I bought 12V LED…
Jeremy Holovacs
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6
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2 answers

What are the effects of AC vs DC for an Incandescent bulb life?

What are the effects of AC versus DC on incandescent bulb life? Provided the same amount of power is being delivered to the bulb.
Pasha Reshetikhin
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1 answer

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 am wondering why this happens. I know all things…
Anonymous Penguin
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LED lighting with incandescent spectrum?

Is there any reason why they don't produce LED lights with a spectrum closely matching that of an incandescent bulb. Incandescent bulbs produce a nice warm light, while LEDs (even warm white ones) produce a kind of harsh light. I think it should be…
Rocketmagnet
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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 actually also works) has some kind of special…
Leandro Bardelli
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4
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1 answer

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 read that it can be of two types thermistor and…
The_Vintage_Collector
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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 blow? And how much does manufacturing / materials…
user22246
3
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0 answers

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 get where I am today by going around exceeding the…
jtolle
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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 hope you can point me in the right direction. My…
user176883
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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 LED components I would need to approximately…
twinlakes
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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 is no resistance across the LED [replacement]…
Brian_Colorado
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What is the hottest filament I could find in an incandescent lamp?

I read old light bulbs get really hot. I read that the incandescent lamps get quite hot but I couldn’t find a filament that gets ‘the hottest’. Is there a filament that gets the hottest?
Benjamin
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