There are three main types of hydroponic lights: Incandescent, fluorescent, and high-intensity discharge (HID). Incandescent lights are not usually preferred by growers. They are found to be inefficient and have poor and limited spectrum range. HID grow lights, on the other hand, provide more light and are more efficient. But the downside of HID grow lights is that they produce more heat. They are more expensive and require high end digital ballasts to operate them. Hydroponic equipments which require more investment are generally not favorites amongst growers.
Greenhouses and solar rooms make use of natural sunlight to provide light to the plants. Having an open window in the grow room can help with this. However, some of the aeroponic plants require no contact with outer atmosphere and in such cases using artificial light source is a better idea.
Remember that generally 1000W will adequately penetrate about 16-25 square feet of plant area. Using hydroponic equipments like a reflector/ light mover can work wonders for indoor lighting. If you are looking for a smaller garden and a cheaper option for lighting, you can go for compact fluorescent light bulbs (CFL bulbs). Although they don’t produce much stronger light, they are useful for hobbyists and small scale growers.
All the hydroponic systems require maintenance and care. See to it that your glowing light bulb doesn’t come in contact with water or it will blast. Also, take care that your ballast regulates electric current properly or else if the bulb is ‘slammed’ with too much power at once, it will lead to short- circuit. Remember that light is one of the most important factor in plant growth and choosing the right light source for your indoor garden will work wonders!