Prefab lightmapping/Prefab lighting

Hi everyone. I was t$$anonymous$$nking about lightmapping and I got a idea but how I don't know how I can do it. here is the t$$anonymous$$ng. Lightmapping the all scene with objects is very long process what if we do it one by one with prefab editor (I don't use too much prefab editor) I know it will be take same or more time as all scene lightmapping process but at least I can see the errors on my models very quick (light bleed or bad uv mapping) I can do it on maya or similar softwares but that's more complicated and takes more time for newbies like me so is there a trick or guide to share I'll thankful.