u/CarefulDevelopment29

I have no experience with lighting, so when I tried to make this epoxy wall light, I put led tape around the border, with a white painted board behind the lights to hopefully reflect it into the whole piece. It didn’t work, so what can I do to have a diffused light source and achieve the look in the second picture? I have 1-3/4” of depth in the frame to work with. Thank you for any advice!