Lighting power of a kitchen and bathroom

[Christophe]

What is the lighting power needed in a kitchen?

Here is an exchange about the power of lighting needed in a kitchen, as it will probably be interesting for other people asking the question, I publish:

HELLO

we want to equip our kitchen with recessed spotlights

I have to remake the ceiling in BA13, which will be insulated with rock wool blown 25cm approx, how should I isolate the spots in the ceiling (fire or overheating)?

our kitchen makes 2.60 m * 5.35m so a rectangle

how many spots do I have to take to have reasonable lighting? I want to take one of these models: https://www.econologie.com/shop/eclairag ... ique-c-100

Is ignition fast? we talk a lot about LED but I doubt a real efficiency in terms of brightness

Thank you for your reply

cordially

stéphane

Our answer:

Hello,

Do not cover spot light bulbs with insulation, there is a standard for this, I think it's at least 10 cm safety distance. To check.

For the light equivalence and the power required, the simplest is to compare with the equivalent halogen power, the 9W model is equivalent to a 40W bulb:
https://www.econologie.com/shop/eclairag ... ique-c-100

If you want more light you can pass on 14W equivalent to 70W ie it lights up stronger than the most powerful halogen bulbs in GU10 (60W):
https://www.econologie.com/shop/eclairag ... ique-c-100

I could not specifically advise a number of light bulb because it is very subjective, it depends if the spots are directive or not for example, if there are other bright spots on the work plans ... I think that 80 and 100W equivalent in compact fluorescents are required between 9 and 12 bulbs of 9W. The work plan alone asks about 30W (3 to 4 bulbs therefore).

To have a quick lighting with compact fluorescents, I advise our customers to put a few bulbs GU10 led:
https://www.econologie.com/shop/ampoules-led-c-90 and to make hybrid ceilings with compact fluorescents. Luxury LEDs 3W illuminate properly but can not yet compete with compact fluorescents. They are also more expensive.

cordially
Christopher M.
www.econologie.com/shop/

And to go further, here is a document from the Union of Lighting on lighting of kitchens and bathrooms.

Too bad that suggestion in W / m² is not given, but as I said, it's quite subjective and it depends, for example, the colors of walls and furniture ... but provide a range of power would have been nice.

[aerialcastor]

What would be good especially it is to speak in lux because to speak in Watt / m² it means just nothing to say.

And for each type of bulb it would be necessary the criterion lumen / Watt, to easily compare the luminous efficiency

[Christophe]

Yes I wanted to say in W / m² for a given type of bulbwhich means something. It is besides this measure which is in the .pdf (Watt by type of bulb): https://www.econologie.com/choisir-l-ecl ... -4309.html so if the pros use it is that it's good no?

People know better what a Watt and a m² than Lux ... but in absolute terms you're right.

The criterion lumens / w is easily found: on 99% of fluorescent bulbs it is now indicated ...

So how much lux is needed in a kitchen?

Ah I just found on an old message, the power advised by place of the house:

Stairs, cellars, granaries 30 lux

Garages, hallway, storeroom 60 lux

Kitchen, games room, lounge, dining room, local
domestic work, waiting room 250 lux

Eating, cooking and leisure work, works
secretarial and laboratory 500 lux

Entrance hall, shower room, bathroom, bedroom
for children, storeroom 720 lux

Reading, writing, handicrafts, homework, DIY,
drawings, makeup 750 lux

Architecture, precise works, exact control,
differentiate colors 7000 lux

Gold 1 Lux = 1 Lumens / m².

So to estimate the Lux, sum up the Lumens of your bulbs (indicated on the box) and divide by the surface of the room where are placed the bulbs.

We will see if my answer to the email was correct:
a) Kitchen, recommended lighting = 250 Lux
b) This model 9W = 500 lumens https://www.econologie.com/shop/eclairag ... ique-c-100
c) Surface of the kitchen: 2.60 m * 5.35m = 14 m²
d) So to obtain 250 Lux it is necessary to provide 250 * 14 = 3500 Lumens.
e) So 7 bulbs would be enough (I had estimated 9 to 12)

I think you need more light in the kitchen than in the living room or dining room ... At least on the worktop, because the kitchen is a place of "work", which is given 500 lux "work kitchen "in the listing above.

So in the end, it would stick: 7 bulbs for the atmosphere and a few others for the work plans.

[aerialcastor]

Talking in Watt made sense when all bulbs had the same luminous efficiency in lm / W, which is no longer the case.

There are regulatory powers on wikipedia

Lux serves as a normative framework for defining, in French and European legislation, the minimum levels required for public lighting and workplace lighting:

* streets, roads and highways: 15 to 50 lux
* intermittent activity or simple task: 125 lux
* average mechanics, office work: 200 lux
* fine mechanics, drawings: 400 lux
* precision mechanics, electronics: 600 lux
* difficult tasks, laboratories: 800 lux

These figures are the minimum levels given by the labor code (R.232-7).

Other examples of illumination:

* sensitivity of a low level camera: 0,001 lux
* full moon night: 0,5 lux
* well-lit night street: 20 - 70 lux
* living space: 100 - 200 lux
* well-lit apartment: 200 - 400 lux
* workplace: 200 - 3 000 lux
* night stage: 1 500 lux
* outside by overcast sky: 25 000 lux
* outdoor in full sun: 50 000 to 100 000 lux

[Christophe]

I agree with you.

I edited my previous message to complement it with Lux advised.

[stefou13]

hello and thank you for your interest in my questions

At the moment I have 3 eco bulbs from IKEO's 11w each one of power

I don't know the lux, the lighting is "sufficient" although a little more light on the shadow points would be a plus, it is a 3 spot ceiling light

so on what basis do I have to leave to have enough lighting?

I installed LEDs under cupboards for work plans, so it's a plus

I thank you for your help in my choice, I have to redo my ceiling during the WE of November 13 / 14

I thank you in advance

[stefou13]

Hello everyone

as agreed I 've redone the ceiling of our kitchen this WE, and put not less than 10 spots

at the moment, there is 10 GU10 halogen in 50 w, as well as it is Versailles !!!

but I will order economic bulbs, now remains to know what model to take?

it's simple, I want it to be as bright as now, but with a much lower conso

here is the rendering of the ceiling with these few 500 watts

the ceiling is not finished yet, there is still painting to do, the kitchen will be white

http://picasaweb.google.com/10453052752 ... 6/Cuisine#

merci pour votre aide

[Christophe]

but I will order economic bulbs, now remains to know what model to take?

it's simple, I want it to be as bright as now, but with a much lower conso

here is the rendering of the ceiling with these few 500 watts

Ben me in your place I Mixed leds smd (for lighting speed and lighting cone) and gu10 9W or 14W (for lighting power when warm):

https://www.econologie.com/shop/eclairag ... ique-c-100

To the eye, I would put 1 smd between 2 fluos.

After this stuff, it's not the price ikeo but it's not the same quality either in terms of lighting and reliability ... (must know what we want ...)

Your consumption would go from 500W to a consumption between 35W (mini if ​​you take 10 GU10 SMD 3W) and 140W (max if you take 10 GU10 14W). Probably to the 60 to 100W according to your choice ...

[hic]

Hello everyone

as agreed I 've redone the ceiling of our kitchen this WE, and put not less than 10 spots

at the moment, there is 10 GU10 halogen in 50 w, as well as it is Versailles !!!

but I will order economic bulbs, now remains to know what model to take here is the rendering of the ceiling with these few 500 watts

the ceiling is not finished yet, there is still painting to do, the kitchen will be white

http://picasaweb.google.com/10453052752 ... 6/Cuisine#

merci pour votre aide

Hi stefou13

the effectiveness of the spots.

Why 3 spots above the work plan,
light the wall at 50cm from a ceiling,
while the worktop is 80cm high?

I remind
that the efficiency of lighting is a function of the distance squared,
as well as its concentration. . . on the work plan.


For simplicity,
I propose that the three spots be suspended from the ceiling,
Installed below the eyes of the cook,
to avoid direct light in the eyes,
and set so that the light scattering angle
coincides with the surface to be illuminated.


AMHA, spotter is a good idea,
situation conducive to LEDs that do not need reflectors
to illuminate in a half-sphere
which gives them a small bonus in addition to their best returns.

[elephant]

I will hold a speech opposite to that of some:

we must not reason in miser, but in lighting.

Go see what is installed in a kitchen and see if it's comfortable.

Some "lighting engineer" references:

worktop: 2 X 18 W fluorescent tubes under cabinet or 3 X 20 wtts low voltage halogen "12 ° spotlights on the ceiling.

mood: 36 W fluo is a minimum, 2 is better (as in offices or 2 X 50 watts halo low voltage

fluo: be very careful with the T ° of color: eating in verdasse is particularly depressing.

Everything also depends on the mood colors: it takes three to 4 times more light in a dark kitchen than in a white kitchen.