Light is the primary determinant. Low light is "low tech". High light is "high tech". That's because with high light you need CO2, generally a pressurized CO2 system. And, with high light you need to follow a complete fertilizing schedule. With low light, you generally don't need to fertilize, but at most you fertilize once a week. Of course with light in between you can choose to go "low tech" or "high tech".