Consider the way you treat the internal area around the velux to direct the light. See attached photo of an example, the 'surround' doesn't necessarily need to be boxy, they can be angled to let more light in.
I'm taking the surround down on the vertical so it merges into wall. I like the idea of them looking like an integral part of the building.
I've got 3 78x140cm going into my 5mx4.5m kitchen area and 2 going into the 4.5x4.5 sitting area.
If your veluxes are close together you might need different flashings.
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wardrobe doors
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