Old 35W bulb with more than 100* centigrade.
Since everyone here worry that led bulbs will burn down their
houses,what temperature can I expect with led?
Led
Is it really the bulbs people are afraid of? Isn't it the house wrecking explosion of lion batteries that people usually talks about?
Led forum is pretty new so I ment it as a bit ironic.
An example;
"I've actually been curious about these LED bulbs. Never tried any since I'm kind of worried that I'll burn my house down. I use 12W CFLs. They last for a long time, and I don't have to worry about them burning down my house, so that's worth something. I can't justify trying LEDs for saving a few watts, which equates to pennies really."
Lennart
It's not so much the temperatures, as it's the drivers. Most of the lightbulbs come with crappy 115-230 VAC to Constant Current DC powersupplys. This isn't a problem if you use drivers of decent quality(as the ones you use for your mobile phone, routers, laptops etc). But if you use a 0.99$ driver from the backroom of a Chinese factory, you are pretty much f**ked if one of the resistors short out, or something like that.
Personally, I buy tons of things from China. But most of the time, I avoid getting things that need AC power. Batteries can cause lots of damage, sure. But the amount of sheer power you can draw from a net socket is way, way more. I do have a few LED bulbs however, but none that I use when I'm not around(a desk lamp for example).
The LED light bulbs on the western marked are usually better quality, but often they save on the LED's. So the light quality and efficiency is usually not that much greater than if you use CFL's. Budget LED light bulbs on the other hand might make sense in a money saved/money spend perspective, but the question of the matter will always be: do you trust them.
Also, since the entire amount of power a bulb uses is converted into heat(even the light will be converted to heat as it gets absorbed by whatever it hits), it's not that a regular incandescent is colder, because it's not. But an incandescent can handle the heat, which an LED can't. Also - a lot of the heat from incandescent bulbs are emitted from the bulb as infrared light. That means that we cant use the light as light, but it still carries energy(=heat) away from the bulb.
Ah sorry, that one went way over my head =)
For what it's worth my 1W GU10 bulb holds a temperature of around 38 degrees C.
Hi Lennart, in order to replace the old 35w bulb, 5w led spotlight is a good choice. The temperatre after one hour is around 60* centigrade. Here you can learn more about this product LED Light Manufacturer in China Shenzhen Wholesale Factory Supplier
My HID goes up to 180 degrees centigrade when i point the infra-red thermometer at the lens. I think the light messes with it somehow. The bezel temperature only gets to a balmy 80 degrees.
I replaced all 300+ incandescent bulbs in my house with LED bulbs (see My adventures in LED home lighting). I measured the heat sink temps on a lot of bulbs (6-25W). They run from 60-90 degrees C. The highest temps were on a 6 watt Chinese PAR20 and PAR16 bulb (90C) and the Sylvania 10 watt PAR16 bulb (88C). All these were in recessed ceiling fixture cans.
A friend of mine lit up a cigarette below one of the Sylvania 18 watt LED bulbs. When the smoke got about 2 feet below it, it was like a vacuum cleaner sucked it up into the bulb. They did some good heat sink/air flow design work.
And if you are using CFL lights, they have a driver in them also. And CFL drivers tend to be ubber-crappy-cheap-ass designs. I’d be much more worried about them than LED drivers. And I have absolutely no worries about the drivers in LED bulbs from well known brand name makers. In most of bulbs that I disassembled, the driver was potted in silicone rubber.
BTW, a halogen capsule can run at over 800C!. Those little 50 watt MR16 halogens are nasty, mean, little creatures.
A better LED light temperature for larger room areas would be anywhere from 5,000K up to 5,200K.
LED bulb was around 60°C to 100°C (140°F to 212°F) depending on the make and model of the LED bulb, room temperature and airflow.
My living room temperature is about 25 degrees,i turn on my led bulb an hour later,i found it is too hot to touch.Is all the LED bulb has a high temperature over a period of time?