The equipment will be a grid of 2x2. So preferred image size (pixel) in order(Equipment, icon, technology): 124x124, 32x32 or 64x64, 124x124.
Also included in the mod is an upgraded version of the portable generator that is a portable nuclear reactor. It instead uses uranium fuel cells to produce power. So it would be even better and save me a lot of trouble if the image could possibly be used for both with may some a color change to make things simple.
Below is an image for an example; however, it doesn't have to be as detailed or exact of course. Also I am looking for images that would fit into the style of Factorio.

Any help would very appreciate!
Thank you very much.