# What is the average intensity of sunlight on the Venerean surface?

NASA writes to say about Venera 8

... measured the light level as being suitable for surface photography, finding it to be similar to the amount of light on Earth on an overcast day with roughly 1 km visibility.

Yes, you can operate solar cells at very low intensities. For example the Juno spacecraft will use them at Jupiter with an insolation of about 0.04 (relative to at Earth). From the Landis paper, a single-junction cell panel at the surface of Venus would require $1.17\,{{\mathrm m}^2\over W}$. That's a lot of panel for not a lot of power. Also it would require a significant technology development to come up with cells that can survive the temperature at the surface.