![]() This bluer light is perfect for plant growth and is therefore referred to as a vegetative light. Metal halides are filled with a gas that when turned on burns and produces light on the blue end of the light spectrum. HIDs come in two different types: metal halide (MH) and high-pressure sodium (HPS). High-intensity discharge (HID) lights, commonly referred to as halide lights, are large-bulbed systems that make great grow lights. Just be careful, as their wattage does vary, so be sure to do some solid research before choosing the correct ones for your indoor plants. Compact fluorescent lights are run at the fraction of the cost of incandescent lights and are cheaper to run than larger fluorescents. ![]() You know them, they’re those twisted bulb-like fluorescents you can buy from the store. So a 6500K fluorescent light will be bluer than the 2100K light.įluorescent lights also come in compact options commonly referred to as CFLs. The warmer the light, the redder or warmer a fluorescent light will appear. The higher the measure of kelvin the bluer or cooler a fluorescent light will appear. Basically, for grow light’s kelvin is a measure of warmth or coolness. Fluorescent lights are often measured in kelvin, a measurement of color temperature.įor example, you’ll often see fluorescent grow lights labeled as 2100K or 6500K. As a general rule of thumb, the narrower fluorescent tubes are, the more efficient and brighter they will be. The most common sizes you’ll find out there for grow lights are T5, T8, and T12s. Fluorescents also make great seed-raising lights, offering optimal lighting conditions that encourage new seedlings to put out robust growth.įluorescent lights are typically manufactured in a variety of sizes. Modern grow lights you’ll find on the market today will emit several hundred units of foot candles.įluorescent lighting is a great option for indoor plant varieties that enjoy either full sun or low or medium light conditions, like Snake Plants, Dracaenas, and Aglaonemas. A foot candle represents how much light is concentrated on any area from a distance of a single foot away. Although, this measurement is now a bit of a relic of the past.
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