Some hydroponic gardeners have a preference to keep what they’re growing in a definitive enclosed environment. If you don’t have the money to buy a hydroponic tent, you can always use an empty cupboard but you will need to make it light proof, feed in a light supply and ensure circulation of air. You may have the problem that while your plants start off fitting inside the cupboard, they might out grow it, so you will have the added complication of re-housing your plants.
Hydroponic tents come in various sizes. They are totally light proof so you know that you won’t have a problem with light spillage from inside the tent and outside light will not intrude during necessary dark periods. Hydroponic tents can be quite expensive due to the light containing material they’re created from.