How to choose plant growth lights besides led grow lighting?

Indoor plant lights can shine where and when there is no sunlight. They allow you to extend the growing season of plants; It can supply flowers, healthy vegetables and herbs all year round; You can also make your seedlings grow in advance before planting outside.

Because of different spectrum, there are several kinds of growth lights in the market, from simple incandescent lamp, fluorescent lamp to HID and then to LED lamp.
Here are the different kinds of plant growth lights, prices, advantages and disadvantages in the market.
Incandescent plant grow lamp
Incandescent lamps are low priced for plant growth lights. A good 150 Watt bulb costs only a few dollars and can be purchased at the local hardware store. Incandescent lamps can keep plants growing in a small room, but if it is an indoor garden, it is not a good choice.
Fluorescent plant grow lamp
All along, fluorescent growth lamps are low output, too big and bulky, can not play a good role, so they are used as seeds or seedlings growth light. Generally speaking, fluorescent lamps are not a good choice for flowering and budding plants due to their low lumen, but they are a good choice for herbs and other plants that do not need a lot of light. Fluorescent lamps can be purchased at local hardware stores or garden supply stores for less than $40. 

HID plant grow lamp
HID lights are particularly bright, very efficient, but the price is also high. A 1000 Watt HID lamp can produce the same amount of light as 50 40 Watt fluorescent lamps.
In the HID category, there are several types of bulbs: high pressure sodium lamp, metal halide lamp, low pressure sodium lamp and mercury vapor lamp. Indoor gardeners need to worry about only high-pressure sodium lamps or metal halide lamps. The more common specifications are 400 watts and 1000 watts. The 400 Watt can provide enough light for a garden of about 15 square feet (1.4 square meters). A 1000 Watt lamp can cover an area of about 4.5 square meters. For rapid growth, about 25 watts of HID lamps can be used per 0.09 square meters.
The metal halide lamp is blue and white, which is conducive to the lush growth of leaves and the compactness of plants. It is easy to use as the main light source. A single bulb can last about 10000 cumulative hours. (the bulb will last more than 10000 hours, but the light will be reduced, so replace it before burning.) metal halide lamps are also a lumen power supply. They produce up to 125 lumens per watt, while standard fluorescent lamps produce 39 lumens per watt and standard incandescent bulbs produce 18 lumens.
High pressure sodium lamp is red orange, which is more suitable for flowering plants. At the same time, it is also economical because its average life is twice that of metal halide lamps. High pressure sodium lamps produce up to 140 lumens per watt. Their main disadvantage is that they do not produce light in the blue spectrum. If high-pressure sodium lamps are the only source of plants, plants will grow thin and long, which is not the type of plants most gardeners want.
How long the growth lamp should be opened depends on the plant and its needs. Most plants and vegetables need about 10 to 12 hours of light a day to grow. Plants that produce fruit or flowers need more time: up to 16 hours a day.

LED plant grow light

LED plant growth lamp, using LED as the luminous body, can provide the necessary light conditions for plant photosynthesis in the absence of sunlight, so that plants can grow normally or better. LED lamps have the functions of strengthening roots, promoting, regulating flowering period and color, promoting fruit ripening and coloring, and improving taste and quality.
In recent years, new LED lighting technology has developed rapidly. As the fourth generation of new lighting source, LED has many characteristics different from other electric light sources, which makes it the best choice of energy-saving and environmental protection light sources.
Compared with the previous three similar products, LED lamp plant growth lights are more powerful and cost less. They can save electricity and generate less heat. Less heat can make the plant lamp closer to the plant without worrying that the plant will be scorched. Because of this, LED lamps can effectively promote plants to grow better, so LED plant growth lights are widely adopted throughout the world.
Led plant lamp also has the following characteristics: rich wavelength types, just consistent with the spectral range of plant light synthesis and light morphology; The half width of the spectral wave is narrow, which can be combined to obtain pure monochromatic light and composite spectrum as required; It can focus light of specific wavelength to irradiate crops evenly; It can not only regulate the flowering and Fruiting of crops, but also control the plant height and plant nutrients; The system has less heat and small occupied space. It can be used in multi-layer cultivation three-dimensional combination system to realize low heat load and miniaturization of production space.
The advantages of LED light source are high luminous efficiency, long service life, reliability, environmental protection and energy saving, so the prospect of LED in the lighting market will be paid more attention