How many lumens do you have in your living room?

Lumen is not brightness, but luminous flux. Whether it is too dark, too bright or pleasant cannot be told from the value.

Thanks, I also couldn't handle the question at all. You should actually be able to recognize where the problem lies yourself, namely where it is uncomfortable for you. Mood lighting like the rail or cabinet lighting I consider overrated. People would like to read and then it is missing there. Everyone has their preferences for writing or playing at the table or watching TV. For example, we need something as "general lighting" on the sofa. Then me, when I read there. With a (brighter) lamp on the TV wall, watching TV works better for us. An accent light is always on in the open kitchen – so there are a total of three lamps that are always on in the evening without being called general lighting or the wattage playing a role. Our main light is not turned on at all, at most when I sew in the living room in the evening or assemble Ikea furniture. That applies to us, elsewhere it is different again. Distance yourself from numbers ;)

For the hallway and the bathroom, I have already calculated something in Dialux that roughly fits when you adjust the lumens and use common lux values. Reality usually looks a bit different, especially because everyone perceives it differently.

Lumen is not brightness, …

On the internet, you can find about ‘Lumen’: “Lumen is the unit for the total light that a lamp emits in all directions. It describes the brightness of the lamp.

For example, a 40 watt bulb has about 400 lumens. …”

You can find almost everything on the internet, including abbreviations. Lumen is a precisely defined physical unit. For omnidirectional emitters like a light bulb, the statement is not wrong. For directed light sources like LEDs, it no longer fits. Maybe try switching the source. The comparison of a laser pointer with a light bulb becomes clear: The 40-watt light bulb has a luminous flux of about 400-430 lumens. A laser pointer with 20 lumens is significantly brighter but has a lower luminous flux.

Sure, the geometry of the light source also plays a role. However, in the living area, we are far from a laser pointer when it comes to light sources. For classic light sources, 'lumen' is always taken into account for brightness. Ideally, with comparable geometries.

But it is true that 'Lumen' does not provide an ideal comparison value for brightness, the more the geometries and also the surroundings differ from each other. More water can flow through a pipe with a very small diameter than through a pipe with a larger diameter. Even in the case of the pipe, the geometry, in this case the diameter, should be comparable.