Depending on the type of pot seeds you grow and light ,you get the amount of space it is able to cover, and size of pot plants to light for feeding may vary. The location of the light also plays an important role. Assuming you have a dark room, which receives only the light of the growth of lights and no sunlight is so you can get an idea here that the light will work for your plants’ inside.
Lights:
A 250w light can give light to under 6 plants. The area that a 250w grow light can cover is about 2.5×2.5 feet.
A 400w light can give light to under 12 plants. The area that a 400w grow light can cover is about 4×4 feet.
A 600w light can give light to under 18 plants. The area that a 600w grow light can cover is about 5×5 feet.
A 1000w light can give light to under 30 plants. The area that a 1000w grow light can cover is about 6.5×6.5 feet.
Most people will use 400 or 600 watt grow lights for their pot plants. Depending on the room size you may want to go with a bigger light (1000w) but most of the time it is best to keep the lights lower in wattage.