lighting requirements

ledbulb

Hi, where can I find lighting requirements in Ireland, looking for them but can't find any on SEAI is some section with lighting guidance but there is no norms or requirements .
Thanks for any help.

djpbarry

ledbulb wrote: »

Hi, where can I find lighting requirements in Ireland...

Lighting requirements for what?

ledbulb

Something like this but in Ireland

Del2005

The information should be on the HSA site.

solas111

Can anyone recommend an LED light with a similar or greater light output to a 150 W incandescent bulb? How many lumens would this be? Does a GU10 base fit into a standard domestic bayonet cap lamp holder?

freddyuk

If you are talking about a "bulb" then the scope is very limited. The biggest lamp bulb is around 11 watts at reasonable cost. Bigger bulbs are not readily available as they tend to be much bigger and get hotter then is ideal and reliability is suspect.They are also getting a bit too big. It is a misconception that LED's do not get hot.
I am running an 11 watt bulb and use it in an uplighter. It is equivalent to 85-90 watts incandescent and it is great for replacing the centre light (which I hate). But there are two issues. The light in LED bulbs tends to be directional so will not radiate all round so using an uplighter gives the best effect for general room lighting. Also light is very subjective so choosing the right colour and right brightness will be different for everyone. Using two 10-11 watts lamps/uplighters will give you the equivalent light in a room as one 150watt bulb roughly.
You can buy bayonet to GU10 adapter for a few pennies but it will extend the bulb height a couple of inches.
If you want an all round bright light then look for "corn lights". You will pay for the output and these provide a cluster of LED's emitting in all directions.

ledbulb

Mostly I agree with freddyuk but cant belive that11W led bulb can replace 90 w traditional bulb its a bit unreal for me but i know a lot of producers put that type of information .Good suggestion to use two lights insted of one .

freddyuk

As I said light is very subjective and each will have a different view. I only speak from experience I do not speculate. I get annoyed with all the hype and misinformation. LED's are the way forward for lighting and it is developing fast which leads to a lack of understanding. People don't want to pay €20 for a bulb if they can get something similar for €3. But most of that €3 goes in heat and will be replaced many times over the life of an LED and it will cost 80% more to run. We want to find that magic 100watt equivalent LED bulb but it is not quite there yet. It will never be the same "light" anyway. It is impossible to compare light via a photo but I tried to show the difference below. In the few seconds it took me to fit and remove a 100watt incandescent it was too hot to touch. A crazy loss of energy except in winter.
We will get used to illuminating a room and then using task lighting to specifically read or write by as the overall energy cost is a fraction of the standard 100 incandescent.

Here is 100 watt centre light



Here is 11Watt uplighter

Here is another view with 11watts

ledbulb

freddyuk you right, maybe we have to use traditional bulbs in winter they are good heaters, i think in next few months we will be able to buy 100W replacement, but in most of cases we don't need them,:) there is many more options with LED lights.

Heroditas

ledbulb wrote: »

maybe we have to use traditional bulbs in winter they are good heaters.

Good grief, what sort of statement is that?
Using bulbs to heat is ridiculously inefficient.
It is cheaper and more efficient to heat using central heating than using incandescent bulbs.

ledbulb

dardhal

Heroditas wrote: »

Good grief, what sort of statement is that?
Using bulbs to heat is ridiculously inefficient.
It is cheaper and more efficient to heat using central heating than using incandescent bulbs.

I think whoever mentioned the usage of incandescent light bulbs as heating sources was just trying to be funny :-)

However, incandescent light bulbs are close to 100% efficient transforming electricity to heat, that's why they are terrible lighting sources. A convection heater , an electrical radiator, a hair drier or an immersion tank are only marginally more efficient.

Of course, nobody on their right mind would use light bulbs as heaters as a general solution, but efficiency is not lower, but higher, than most domestic commercial gas boilers (which, except for condensing boilers, have efficiencies ranging from 80 to 90%). The main factor making "central heating" (I guess you mean gas-fired central heating) cheaper is not efficiency, but the respective energy costs, which for gas, is about a third than that of electricity (in price per KWh).

freddyuk

Waaaaay off topic!!:mad:

Capt'n Midnight

They are more efficient than CFL's but cost a lot more and are getting cheaper all the time.

White LED's use fluorescent substances so have the same warm / cool thing as CFL's.


Kinda hard to justify buying LED's today when you can get CFL's for €1 or €2 in Atlantic and know that LED's will have dropped more in price by the time you need to replace the CFL's

Lasers are more efficient than LED's so expect this technology to take off. It's a quantum thing. The lasing threshold is the lowest excitation level at which a laser's output is dominated by stimulated emission rather than by spontaneous emission. BMW claim twice the efficiency.
http://wot.motortrend.com/bmw-shows-us-how-its-laser-headlights-and-dynamic-lightspot-work-126103.html

TBH I wouldn't be investing huge sums in LED's because Lasers are twice as efficient.

Technically speaking a laser is a special type of LED and diffusing light isn't all that difficult.


White paint is another way of getting more light per watt
Stories of people tunnelling through chalk using candles getting snow blindness.

Heroditas

dardhal wrote: »

Of course, nobody on their right mind would use light bulbs as heaters as a general solution, but efficiency is not lower, but higher, than most domestic commercial gas boilers (which, except for condensing boilers, have efficiencies ranging from 80 to 90%). The main factor making "central heating" (I guess you mean gas-fired central heating) cheaper is not efficiency, but the respective energy costs, which for gas, is about a third than that of electricity (in price per KWh).

You have to take into account the efficiency of the generation mix - which in this country is 40%.
That 40% is then translated into heat in the light bulb.

Gas central heating is indeed cheaper but is also more efficient.
Heating using electricity is inefficient - simply because of all the waste heat at the generation stage where thermal plant is being utilised.

It becomes a different story when the likes of wind, wave and solar are used for generation though.

Capt'n Midnight

Heroditas wrote: »

You have to take into account the efficiency of the generation mix - which in this country is 40%.

The CCGT plant in Cork is nearly 60%
and our wind usage is creeping up over time.

But like I said lasers are twice as efficient as LED's
Below the lasing threshold lasers are LED's.

It becomes a different story when the likes of wind, wave and solar are used for generation though.

And we can set our smart meters to give more light when it's windy

Heroditas

Capt'n Midnight wrote: »

The CCGT plant in Cork is nearly 60%
and our wind usage is creeping up over time.

But like I said lasers are twice as efficient as LED's
Below the lasing threshold lasers are LED's.

And we can set our smart meters to give more light when it's windy

The CCGT plant in Cork is indeed nearly 60% but we still have coal and peat in the fuel mix and, also taking transmission and distribution losses into account, the overall efficiency of Ireland's system is 40%.


In an interesting aside, coal is currently displacing some gas off the generation fleet here because of the low price of carbon!


EDIT: technology in lighting is advancing at a staggering rate. It's very exciting at the moment.