How to sync light component

Hello, as you might be able to tell, I am pretty new to Unet.

I am trying to sync a button that toggles a light, currently it only works client-side (only player that turns off/on light can see change, other player sees it the same way it was before, you get it)

What would be simple way to do that? Sorry I am pretty confused atm.

 

Send rpc/event that you enabled it.