This is made with MDO panels and wood trim, all painted. Good luck with your project!

However, this was not originally sidelights, and the panels are applied to the exterior of the home. You'd need to infill the walls if you wanted to go for this look. You could also do fixed doors in place of your sidelights.

all of this is so helpful. the previous owners had covered and finished off the inside wall over the sidelights but left them in place on the outside, with nothing but particle board to see through the glass, so I either have to replace and clean up the inside or cover them up, and I do love the look of your house! thank you for all your help.