Marijuana lights or grow lights are used in indoor cultivation to replace the sun, or in areas where the sun just doesn't shine enough. There are many types of marijuana grow lights used in cultivation. Generally, the rule is the more light the better. All lights however, were not created equal for this purpose. For marijuana lighting, standard bulb or halogen lights simply won't cut the mustard. The frequency and color of light it emits are just not right for the grow room. Large scale or commercial growers, will often use special fluorescent lights due to their relatively low electricity consumption and cheap replacement bulbs. These can work alright however, the grow lights of choice for marijuana cultivation are usually metal halides and high pressure sodium (hps) lamps. These lights are much more expensive and use far more electricity but do produce far better results.
Metal halides produce light in the blue spectrum making them ideal for marijuana in the vegetative period. HPS emit light in the yellow/orange spectrum. These frequencies are ideal for the flowering or budding phase. So what's the best marijuana lights to use? Growers will often use a metal halide throughout the growing process and bring in a high pressure sodium lamp just for the budding phase. Though, frankly, either can be used quite effectively through the entire growing process. Unless you really know what you are doing, its best to only use fluoros in the germination process.
You will find below a variety of marijuna grow lights.