How to convert Xcode light properties to three js values?

Hi,

We are creating products through xcode editor and adding lighting properties and intensity while simulation. After that by using three js we are rendering it as 3d product. But I am not sure how to convert light intensity xcode to respective three js values. Ex: from xcode i get 500.0 as ambient light intensity, how to convert it to suitable three js intensity?

Please adivse.