2 lights, same settings, different results. How can I fix this?

mine

Hello, 

I am having some problems with UE4 lights and shadows. These lamps have exactly the same light settings, using same the ies light profile and being baked on the same wall. The one on the left side is ideal. The other one's shadow have harder edges. 

Can anyone guess why? I can post specific settings if anyone needs.

Thank you,

M.

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mine

Ok, I got this!  

I was using stationary light for casting ies profile as well as lighting the shade, and static light for general lighting.
It turned out that static light's source radius was 0 for the lamp on the right and it was 10 for the other one.

I thought it had to do something with the material, ies or shadow casting. I totally missed the radius there.

Thank you TeriyakiStyle. 
Here is the new lamp.

Cheers,
M.