In an outside room I have several fluorescent lamps under a long table,
where I put young plants in cold nights and days in springtime.
There the plants can grow free of frost.
But in the moment it is too cold even in this outside room
and I don't like to heat this room for a lot of money.
Therefore I took a fluorescent lamp and hang it from a wooden frame.
This frame I put over the herb container.
Now the herbs can stay in the warm kitchen and have enough light to grow.
I let the light burn 24 hours a day, because I have very good experience with this way.
But you can also switch off the light in the night.
The young herbs seem to like the new light,
because more and more are comming out of the soil.