Is there any way to position the light right above the plant? Because CFLs are only effective for plant growth when less than a foot away from the plant. A desk lamp 4 feet away and to the side probably won't make much difference to the plant.
The best pothos for next-to-no lighting would be a jade pothos - it is entirely green with no variegation - but that kind is hard to find. Golden pothos is the most readily available species and that would still work better than the marble queen type but I would still try to put the light closer to it for best growth.