i had pothos plant growin nuts with low light , almost no light.
Plants require to light *energy*, carbon dioxide , SUgar to create photosynthesis.
the basking light puts of heat which works as energy, the plants don't use the UV very much but will use the heat put off the basking bulb alot more.
BUT natural light in the morning is best, so if you can give your plants morning sun , they perk up really well, especially ficus benjamina.