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|  | | FAQ Lighting
Fluorescent Plant Grow Lights
Fluorescents are an excellent choice for starting seedlings to get a jump start on spring plantings. They also are excellent for cultivating a cool weather harvest in the basement year round. Leaf lettuce, spinach, and herbs all will do well year round under fluorescent lamps. The trick is to keep the fluorescent bulbs no further than 4 inches away from the tops of the plants. Since the tubes burn relatively cool to the touch, you do not have to worry about burning plants unless they are actually touching the bulb. Fluorescent tubes are excellent for display and grow lighting for african violets, small cacti and succulents, and many kitchen herbs. New advances in color blending make full-spectrum fluorescents one of the truest color rendering lamps on the market today. Fluorescent tubes are twice as efficient as incandescent bulbs, producing twice as many lumens per watt of energy consumed. Fluorescent bulbs have an average usable life span of up to 20,000 hours... more than 25 times as long as an incandescent.
Metal Halide HID Plant Grow Lights
Metal halide is a highly efficient light source capable of delivering a white light in the range of 2700 to 5500 Kelvin degrees with typical Color Rendering Index (CRI) ratings in the mid-60's to mid-70's. Some lamp chemistries even obtain CRI's in the 80s. The CRI is an index that measures how closely an artificial light source matches the natural colors of sunlight, with 100 being a perfect score. In contrast, high pressure sodium lamps yield yellow lighting (2200K) and have a very poor color rendering index of 22.
By varying the blend of chemicals in the arc tube, metal halide engineers are able to alter the characteristics of the light output. This flexibility in design makes metal halide so versatile. White light is a very important attribute of me |
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