adequate · sufficient · abundant

The room lighting is sufficient.

A growing child who doesn't seem to have much energy perhaps needs medical attention.

In Denmark, where the Meteorological Institute reported that the month of July has been the sunniest since they started recording data in 1920, sales of alcoholic beverages dropped in favor of non-alcoholic beers and sodas.

We need not only adequate water but clean water.

With adequate lighting, one can easily discern Nosferatu, with his pointed incisors and extremely long-limbed fingers, known as arachnodactyly, from common vampires.