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House light bulb is too hot


bellboy
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HI guys, I have a IKEA lamp with a dimmer function.

The bulb (see below) that comes with it is super hot.

 

I asked my nearby hardware shop and they said the LED bulb they sell can fit into the lamp head, but it cannot work with dimmer. If I adjust the dimmer, the bulb may blow. Why is that so?

 

What bulb should I change to and where can buy?

My main objective is to change to a not hot bulb.

post-50942-0-71200100-1426059649_thumb.jpeg

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I don't understand why. But anything LED based dimmer is going to be expensive.

Even for my taobao night lamp, it costs 40+ SGD.

 

Usually dimmers only work on the old school incandescent bulbs right. That's probably what you got, that's why it's so hot.

Most Compact flourescent don't dim as well.

Edited by Lala81
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If you live without dimmer, get a LED replacement bulb with the correct wattage and lumens suitable for your desired ambience.

 

I have a super bright LED bulb installed at my door entrance. It's on 24/7/365 and it does not feel hot or consume much electricity.

 

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Turbocharged

 

HI guys, I have a IKEA lamp with a dimmer function.

The bulb (see below) that comes with it is super hot.

 

I asked my nearby hardware shop and they said the LED bulb they sell can fit into the lamp head, but it cannot work with dimmer. If I adjust the dimmer, the bulb may blow. Why is that so?

 

What bulb should I change to and where can buy?

My main objective is to change to a not hot bulb.

 

 

An incandescent bulb dims because the current that passes through the filament can vary. LED bulbs however doesn't work that way hence you need compatible dimmers.

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(edited)

If you live without dimmer, get a LED replacement bulb with the correct wattage and lumens suitable for your desired ambience.

 

I have a super bright LED bulb installed at my door entrance. It's on 24/7/365 and it does not feel hot or consume much electricity.

 

 

Its a good suggestion.

But if I adjust the dimmer, will the bulb blow or spoil?

 

An incandescent bulb dims because the current that passes through the filament can vary. LED bulbs however doesn't work that way hence you need compatible dimmers.

 

Thanks for the technical reply. So if I vary the current using the dimmer, what happens?

If nothing happens is fine. I just scared the LED bulb will blow. Which is what the hardware shop told me.

Edited by bellboy
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Its a good suggestion.

But if I adjust the dimmer, will the bulb blow or spoil?

 

Thanks for the technical reply. So if I vary the current using the dimmer, what happens?

If nothing happens is fine. I just scared the LED bulb will blow. Which is what the hardware shop told me.

 

 

whatwheel already gave you the site ... bulb with dimmer. :blink:

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whatwheel already gave you the site ... bulb with dimmer. :blink:

 

Wah bro.... its like telling me to change my car because I dont like my rims. :blink:

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Wah bro.... its like telling me to change my car because I dont like my rims. :blink:

 

ohhh u wan Not Hot bulb .......... LED only lor . As the some here said, dimmer one cost more for LED.

 

 

Edited by Angcheek
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The least risk is to stick to the intended design of this lamp. I am sure Ikea lamps come with instructions and specification on type of bulb it can and cannot take. Always stay stock for electrical. If you have misplaced the leaflet, ask Ikea for one.

 

 

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*facepalm*

 

They sell dimmable led lightbulbs.

http://www.lazada.sg/tisec-dimmable-led-bulb-9w-e27-cool-white-6000k-2-bulb-package-export-372408.html

 

The example I gave, the head size is E27. You just have to check the size of your bulb and go search for the right one.

 

It will not look exactly like your sample but for light bulbs as long as the size is correct it will screw in nicely.

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*facepalm*

 

They sell dimmable led lightbulbs.

http://www.lazada.sg/tisec-dimmable-led-bulb-9w-e27-cool-white-6000k-2-bulb-package-export-372408.html

 

The example I gave, the head size is E27. You just have to check the size of your bulb and go search for the right one.

 

It will not look exactly like your sample but for light bulbs as long as the size is correct it will screw in nicely.

 

i think his concern is cost

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Thanks all for the inputs.

 

Does that mean as long as I buy a LED bulb that is dimmable, then can do?

 

I dont need a compatible dimmer like what Porker said?

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Supersonic

For incandescent bulb, usually the dimmer adjust duty cycle of AC voltage.

Less duty cycle, less brightness of the bulb.

 

In LED, the brightness depends on the driver providing constant current.

To get more brightness, you increase the current and vice versa.

PWM method is more effective, but cost is higher.

http://www.electronicproducts.com/Optoelectronics/LEDs/LED_101_How_do_dimmable_LEDs_work.aspx

 

So the 2 types of dimmer are not necessary compatible.

 

The cheaper and worst kind of dimmer is probably using adjustable resistor.

All the heat is dumped on the resistor, making it very hot.

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Why it has to be so complicated ?

The dimmer control is a variable resistor to add "resistance" to the incoming current. Less resistance means brighter, more resistance means less bright. Simple as that.

 

A dimmable led bulb has built in circuit to "adapt" to the variable input current. A regular led bulb doesn't has such a built in circuit.

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The image posted looks like 150W which is a lot of lumens.

LED replacement would be at least 23W.

 

 

 

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