Note: Since the roof I was working with is made of terra cotta tiles, I used a glass tile, designed to interlock with the terra cotta tiles, but if your roof is made of a different building material, you may consider using a sheet of plexiglass or skylight instead.
• Glass roof tiles
• Solar path lights
• Super glue
• A ladder
Step 1: Build a veranda
Step 2: Glass roof tiles
After shopping around a bit, I found that glass roof tiles, or "telha de vidro," are extremely expensive. These two tiles cost about $US40 each, which my father-in-law tells me was about the cost for all the terra cotta tiles for the roof. This is why these tiles are generally used for accent, to provide a bit of sunlight by day.
But of course my plan is to provide not just daylight through the roof, but a bit of solar light by night.