Light intensity relate with size

[ileste]

 Why when I increase radius of the light the intensity also increase and get brighter in the room. I put the intensity in lux, lumen that mean all light from it is that put with the number, why is it increase when I increase light size

[maru]

Hi, you can use different light intensity units in Corona. Some of them tell you how intensive the light is at given surface. Other ones tell you how much light is generated in general. Depending on the kind of units you choose, the light behavior will be different.

[ileste]

Which one is which please help me I am confuse.
I need to put the number in general lets say 100 watt light bulb and I don't want light intensity to change when I increase the size, radius of the light.

[romullus]

Use lumens then. It's light source area independent unit. 100 watt incandescent light bulb has approximately 1600 lumens.

BTW, if you live in EU you can find how many lumens has particular light bulb by looking at its package. This info is mandatory in EU.

[ileste]

I think size is matter, but not is intensity that depend from he size, is that small light lets say in average room small then 5cm radius it will not render proper the noise it will be unacceptable an will be a lot darker because not many rays will find it.
Any solution because I don't want to have in the room lighting balls :D I want to have lighting bulbs

[Ondra]

actually corona should not have problems with light size, because it uses MIS... do you have some specific scene with a problem caused by light size?