Flat roof house with skylights

I have a Spanish-style house with old red tile perimeter and flat roof with white foam roof material in the center part. This house is as dark as a dungeon due to an enclosed porch.

I need skylights! Does anyone have experience with gable roof skylights that let in more light than the standard home center skylights? I am looking for a vintage look and hail durability.

Please give me your skylight tips. I am tired of having the lights on all day and need some sun.