LED recessed spotlights from Ledando GX 53 socket

Hello everyone,
I am new to this forum, hope you are all doing well
My wife and I are currently building a house in Austria, we are building a timber frame house with cellulose insulation.

My question:
I plan (see plan) to illuminate large areas with LED spots both on the ground floor and the upper floor. Attached is a small plan with my ideas. I plan to install spots from the company Ledando (I hope I am allowed to write the name here), specifically the GX 53 socket (due to the low space consumption in the ceiling) with 5.5 watts, 400lm, 120° beam angle, direct connection, and 230 V mains power. In the living room, I want to dim the spots.
The violet marked points are intended to be recessed wall spots along the staircase.

Can anyone tell me if the number I planned is heading in the right direction, if there is anything special to watch out for, or if there are better options for spots.

Many THANKS and have fun building!

300 Lux (lumens/m2) for bathroom and kitchen, otherwise at least 150 Lux for all rooms. Preferably divide into primary and secondary lighting. In your case, the ceiling spots would be the primary lighting, right?

300 lux (lumens/m2) for bathroom and kitchen, otherwise at least 150 lux for all rooms. It’s best to split it into primary and secondary lighting. In your case, the ceiling spots would then be the primary lighting, right?

For the dummies as a reminder:

For bathroom and kitchen, the lighting should reach 300 LUX, where one lux indicates lumens per m²?

Unfortunately, it is often the case, at least online, that the products only specify lumens. Calculating lux from this is only approximate for laypeople. If you google "calculate lux," you quickly find several guides. Here is a quote from one of them:

A GU10 LED with 350 lumens, a beam angle of 35°, and a distance to the floor of 2.40 meters achieves a
lit area with a diameter of 1.5 meters,
a lit area of 1.80 square meters,
a luminous intensity of 1203 candela, and
an illuminance of about 208 lux

A corresponding calculator with input fields for the parameters is also available there.

It becomes slightly more complicated when multiple spots are installed with a distance of 0.5m - 1m and their light cones overlap.

In this regard, I found the following statements after searching for "calculate lux multiple spots" and reviewing several entries. It says that the calculated lux of two lamps can be added in the area of the overlapping light cones.

For a workplace, an illuminance of at least 500 lux is recommended. For example, if you want to optimally illuminate a one-square-meter desk with recessed spotlights, the sum of the luminous flux of all spotlights must be 500 lumens. Suitable are five recessed lights with 100 lumens each or ten with 50 lumens each. We see best if the brightness is evenly distributed. Accordingly, pay attention to equal distances between recessed spotlights. If they are to be mounted in a row, for our example this results in a distance of 25 centimeters between the more luminous recessed spotlights, correspondingly less if you choose weaker ones.

The guideline for workplaces does not imply that the entire room requires this level of illuminance. For general lighting, 100 lux are sufficient for workrooms. This also applies to kitchens. While 100 lumens per square meter of floor area are sufficient for general kitchen lighting, spotlights should be provided over the work surfaces and stove, which together illuminate with a strength of 500 lumens per square meter.

For example, in our case, we planned spots above the kitchen work surface with distances of about 70cm and 100cm. I selected example spots with GU10 socket, beam angle 36°, and 245lm. According to the calculator, the diameter of the base area of the light cone at 2.4m height (i.e., on the floor!) is 1.5m and there it has 138 lux, and at 1.5m height (i.e., on the kitchen countertop!) about 1m diameter with 345 lux.

Our spots should therefore easily cover 1m to reach around 300 lux on the countertop. The same spots are just sufficient for the living area (2.40m height), with slight overlap of the cones. Since we planned spot distances of about 1.3m in the living area, it might just be enough. However, I will still try to look for a somewhat stronger light source there.



The above was learned in a layman way through Google. Can someone confirm this or possibly correct me if I’m talking nonsense?

First of all, thanks for your answers. 1) Yes, the spots would be our primary lighting and I would only add a pendant lamp above the dining table and possibly a floor lamp by the sofa. 2) why do you choose lights with such a narrow beam angle? Don’t you need an insane number of lights to get even lighting? Why not use lights with more power and a wider beam angle? When asked at Ledando, it is recommended to place the spots I mentioned 1.2 to 1.5 meters apart. What do you think?

We have not chosen any spots yet, I simply took the second-best spots I found through research.

A higher beam angle also means that with the same lumens less light is available. In other words, the light source needs to have more power.
However, between 300 and 700 lumens, I have not found many light sources yet.

Furthermore, my calculation shows that exactly the right light would be achieved.
Are my calculations wrong?

For the calculation of whether the lighting is sufficient, I can recommend the free software Dialux. It is quite professional and also requires some time to learn, but then you can be sure whether the lighting is sufficient. In our rental apartment, it is especially my wife who is bothered by the mostly poor lighting, which is why we pay close attention to it.