Lightbox - custom/responsive space around image on mobile and small screens.

[spontans]

Dear Laytheme support,

I've set the "space around image" value in Lightbox addon to: 150px.
On large screens, it works just fine, but on small narrow ones (13" 16:9) and mobile screens the images are way too small.

Could you please assist me with setting custom margins for the image? maybe there is an option to set the parameters in %?

Here is a lightbox example from the website I'm currently developing building:

http://avishay.wwwnlsrc4.supercp.com/kibbutz-night/

Thanks in advance and looking forward to your promt reply.

Sasha