IANAM, but it might be possible to hack the daytime brightness, temperature, and/or vampire-friendliness to have the daytime be effective nighttime. OTOH, as anti-daylight as Pescado is, I'd expect he'd have tried such a thing before. Its non-existence might well speak to its current impossibility.
Aside from not knowing what IANAM stands for, that makes sense, and you're probably right.