The apartment I just moved into has a large south-facing windowsill, measuring about 6x5 feet. I'm in a high rise, so there is no shading from trees or other vegetation. I have heard that south-facing windowsills get the most natural light (in the northern hemisphere, at least), so I was thinking of trying some mexican pings and subtropical Drosera. The area where I live (upstate New York) tends to get among the fewest hours of sunlight per year of any region in the United States, particularly in the winter. It is nice and sunny now in August, but I have heard that winters here tend to stay perpetually overcast.
Should these windowsill conditions be sufficient, or would it be best for me to invest in supplemental lighting?