I want to get some natural light into my 8 x 8 bath/laundry room. The washer/dryer/water heater are in a 3 x 8' area with bypass doors. The actual bath is 5 x 8.

I'm torn between a fixed pane window in the alcove tub/shower surround (long narrow rectangle), which I would tile in; or a small tube-type skylight.

Which one would need less maintenance? I'm all about easy-to-clean these days! Would the window be more apt to get moldy? Water spotted from the shower, etc?