Maximum Lightbulb 60w

[qld]

On some lightbulb connections it says a maximum wattage of 60w.

Does this maximum have more to do with the actual plastic covers,etc. melting rather than only being able to run 60w of power through the wires?

[echnidna]

I've always assumed its to do with the heat of the globe

[Ian Smith]

Qld,
It's all to do with the heat generated.

Unless Mr. Ohm has been proven wrong you can run about 40 of those 60 watt bulbs from a single standard 10 amp circuit

Anyway, why not use the newer more efficient energy saver bulbs?
Even less heat (about 20 watts I think and same light) and your light fittings wont suffer

Ian

[qld]

The energy bulbs possibly give me headaches and are annoying to dispose and greater risk of smashing. Mercury poisoning as well possibly.

I enjoy the other bulbs better.

Also I have a touch lamp with no shade or anthing about 40cm from my head which has a 200w regular incandescent bulb in it to keep me warm.

So i also use bulbs for heating.

[qld]

http://img154.imageshack.us/img154/1221/heatshoulder.jpg (http://img154.imageshack.us/i/heatshoulder.jpg/)

<a href='http://img154.imageshack.us/i/heatshoulder.jpg/'><img src='http://img154.imageshack.us/img154/1221/heatshoulder.jpg' border='0' alt='Image Hosted by ImageShack.us'/></a><br/>

http://img154.imageshack.us/img154/1221/heatshoulder.jpg

That Green Triangle on the bottom right corner of the picture is my shoulder.

Helps dry my hair and keep me warm.

[qld]

With regard to touch lamps. My lamp I got here you touch it once it turns on, hit it once more it gets brighter and touch it once more it gets brightest. Then touch it again to turn it off.

Does this effect the life a lightbulb much in terms of hours it will last compared to a bulb that stays turned on for hours ata time?

[Ian Smith]

Qld,
In theory, if you run anything below it's rated performance figures it ought to last longer than if it's run flat out the whole time.
However, having said that, if you give it a smack around the ears every so often I'm inclined to think that may very well shorten it's life.

If things go to plan you'll have real trouble buying an incandescent bulb in about a year or so, so you'd better stock up now. Coupled with that, and here's one for the conspiracy theorists, I reckon that those incandescent bulbs don't last nearly as long as they used to


Ian

[qld]

Most 60w, 75w and 100w bulbs are sold out.

i think they are still allowed to import the 150w and 200w bulbs i use for heating and spotlights.

You can still buy the 15w over pilot lights, the 25w and 40w pointy candle lights.

100w Halogen equivalent ones that look the same orange type light cost $5 from bunnings warehouse. Actually I think these would mean they are actually 140w is the light that gets thrown out by them while 100w of halogen power is consumed.

the 60w halogen equivalents cost $2.50.


Would Halogens be hotter for the same wattage?
A 100w halogen bulb hotter than a 100w incandescent bulb?

[qld]

Im getting an edison to bayonet and a bayonet to screw in converter.

http://images.marketplaceadvisor.channeladvisor.com/hi/69/68784/401.090.jpg

Is there any problems i might encounter using these?

I imagine they are simple things just different shaped pieces of metal for the electricity to travel along

[Ian Smith]

Qld,
Watt for watt I believe that the halogen are brighter. I use pairs of 40 watt candles in my fan lights. Their equivalent halogen is 28 watts and they appear to just as bright (and they last longer)

I doubt you'd notice the difference in temperature between the 100w halogen and the 100w incandescent - a watt is a watt and that's the power they both consume. i.e radiate

Ian

[woodcutta]

Qld,
Watt for watt I believe that the halogen are brighter. I use pairs of 40 watt candles in my fan lights. Their equivalent halogen is 28 watts and they appear to just as bright (and they last longer)

I doubt you'd notice the difference in temperature between the 100w halogen and the 100w incandescent - a watt is a watt and that's the power they both consume. i.e radiate

Ian



Qld

A watt is a watt and the power is consumed as Ian says, but the output efficiency (what is radiated) is the difference.

A 100 Watt Incandescent globe radiates 2.1 Watts of light and 97.9 Watts of heat
A 100 Watt Halogen globe radiates 3.5 Watts of light and 96.5 watts of heat
A 100 Watt Fluorescent lamp radiates 8 Watts of light and 92 Watts of heat

Therefore a 25 Watt flourescent has about the same output as a 100 Watt Incandescent


woodcutta

[qld]

I was not comparing things equally.

I just noticed my desk 25w halogen lamp is much hotter than say a 25w incandescent lightbulb would be.

But that is probably because the filament,etc. of the halogen is only 1cm from the protective cover whereas the the filament of a bulb is much further away to the outside glass

[Harry72]

Woodcutta, I'd like to see how bright a 100w fluro would be, reckon some very dark sunnys would be needed!

[soundman]

the wattage rating stamped on lighting products in particular the lamp holders is definitely to be taken notice off.....these restricted wattage lamp holdrs are made from less heat resistant plastics and WILL FAIL if you run higher wattage lamps in them.

I was working with a bunch of projectionists on an exhibit once and one of the projectionists insisted in putting a 100w lamp in a lamp holder clearly markes 60 watt.... I pointed this out to him & he treated me like an idiot.......he wated more loght to see when he was working on the projector.

ANYWAY....... Here he was fiddlinmg with the gate of this projector with his head in the works and the lamp right next to his head..... I was watching him ( with some others) and the hot 100watt lamps spat out of the holder right into his bare ear:D...he jumped banged his head and his forehead on the machine and swore...:D.... I laughed:D.

QLD you ahve some strage ideas about heating.......a light bulb would have to be one of the most inefficient heaters arround.

cheers

[qld]

For example a 200w Bulb uses 200w of power but the heaters you see on the market usually use 400,800 and 1200 watts.

[Ian Smith]

We need a "Can of Worms" emoticon :rolleyes:

[soundman]

For example a 200w Bulb uses 200w of power but the heaters you see on the market usually use 400,800 and 1200 watts.

yeh but your 200 watt globe will be radiating probaly about 20 watts of visable light.

and of the remaining heat about 80 watts about 10% or less will be heating you.....the rest will be heating the walls, the cieling and by far the majority will be heating the air above the lamp... almost none of that heat will be warming the air in the room where it matters to you.

If you are going to be a scotchman with heating.... put on a jumper.

Ir by far more sensibly, invest in reverse cycle airconditioning.....by far the most economical and efficient form of electric heating........you can produce up to 6 times as much heat for the same amount of energy than you would by any form of resistive heating.


As for me.... I burn wood.....arround this place it falls out of the sky at the rate of about a tonne and a half a year.....then there are the scraps out of the workshop......if i didn't burn it... it would rot and produce methane....which is 4 times worse than the burning it.

if you want lots of heat fast.... you cant beat burning something.:D

cheers



you would be better warming yor self by a roaring candle.

[qld]

So most the heat from a bulb comes straight out of the top of the glass? Not out to the sides?

[kiwigeo]

For example a 200w Bulb uses 200w of power but the heaters you see on the market usually use 400,800 and 1200 watts.

Power = Voltage x Current

Watts = Volts x Amps

200 watts = 240 volts x 0.833amps. Thats the current your light bulb is drawing.

1200 watts = 240 volts x 5 amps. Thats the current your 1200 watt heater is drawing.

This is why the light circuits in your fuse box generally have lower rated circuit breakers than the circuit for your wall oven is on.

[rrobor]

Heat is the issue. as Someone said most of what an incandescent globe produces is heat. We have a small loo with a batton style fitting driving a 60W bulb. if thats left on you can smell the socket and the ceiling, smells like p --Well it smells like you forgot to flush. Now Ive got one of those new globes in, which when sitting in there seems to offer you incouragement. It starts dull then just as you are ready to leave its at full brightness.

[soundman]

So most the heat from a bulb comes straight out of the top of the glass? Not out to the sides?

sorry that is not correct........a very large portion... all the radiated heat will be emitted over a 36o deg x 360 deg radiation pattern.....that is why you wont feel much of it.

the small portion you may feel comming out the top is that from heating the glass envelope because it is reasonably concentarted... it will be a relativly small portion... and it will go straight up and there fro be useless for personal or room heating.

take your 200 watt lamp... and a standard wax candle.... comare the heat comming off the top of both.

you'l be better warming yourself by a roaring candle.

cheers

[Bob38S]

Please correct if I'm wrong as I'm no electrician but it is/was my understanding that if you wanted to put a stronger light output into a 60W maximum rated socket then it is/was OK to use one of those new "efficient" light bulbs which , so called, give 100W output but only consume 18W. I was led to believe that as they run cooler that they were OK for a 60W rated socket.

Regards,
Bob

[qld]

I got one bulb also hanging between my chair legs heating my ankles and another I clip to the desk in front of my and heat my legs.

[qld]

The tiny size general electric bulbs come in sizes up to 100w. They are a smaller bulb so i assume the outside glass is relatively hotter but I suppose the smaller the glass is the more opportunity the heat has to escape into the general air rather than melting the plastic parts of my lights.

[Ian Smith]

Awwww c'mon - this has got to be a wind-up !!

[Bob38S]

Awwww c'mon - this has got to be a wind-up !!

I think the heating up part could be someone having a go. :pointlaugh:

[qld]

Seriously it works good.

Im really messy person so i cant use a regular heater or a candle because im always accidentally kicking stuff so the work light is good. The work light is cheap as well prices from around $9 at bunnings for the arlec one.

The best worklight with a regular bulb imo would be the $20 rubber kambrook I think they sell it at big W with the open lid.

Id say the chance of accidental fire is lower than with a regular heater because i leave the bulb in the open air to cool off and it does cool off very quickly.

I was going to get a lightbulb extension chandelier type thing for my touch lamp so i can hang a bulb next to my hip or shoulder rather than head high bulbs which i think might give me a headache.

This is the best bulb work lamp imo:

http://svc044.wic026p.server-web.com/ssl/cms/images_cms/tf1_low_large.jpg


Trouble Finder Lamp
TF1

Made from tough moulded plastic
Accepts standard light globes
Plugs into an extension lead
60 watt globe max
RRP $19.95

With the 200w bulbs they also have much thicker pins that can break socket fitting.

[rrobor]

Bob you answered your own question it consumes 18W of energy its not what the equivalent incandescent light is

[soundman]

In all seriousness........ a silly and probaly dangerous method of heating.

All items as described not designed for purpose and very probaly not fit for purpose.

I seriously hope you don't burn yourself and your house down.

cheers

[qld]

How much heat comes out a 15w or 25w bulb.

Is it about the same proportion heat to numbers?

[kiwigeo]

If you read back through this thread I think you can soon work out that if both bulbs convert electricity to heat and light with the same efficiency the higher wattage bulb will put out more heat.

[soundman]

sooner or later all energy that does into a light bulb will come out as heat......a minor persentage of that energy will radiate as visable light and be converted into heat as it strikes a surface or disapates in air.

of course the heat output is proportional to the wattage.

cheers