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    Contact£ºKelly Liu
    Email: info@sgrowled.com
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    Led Grow Light VS HPS
    [2017/7/15]
    Light Timers - Automation
    LED grow lights often come with built-in, easy to manage, timers. These timers automatically turn light on and off - don't forget that many plants to grow properly require periods of darkness, especially for proper flowering. Therefore, when growing berries indoors, keep light on for not more than 17-18 hours, so that plants have at least 6-7 hours of rest. The optimum light and dark ratio depends on the species and variety of the plants - if you are not sure about this, keep the light on for 16-17 hours and your berries will do fine.
    Combining automatic light timer with water pump timer creates growing system that requires almost no daily care, except for one thing - hand pollination and picking of the fruits.
    LED Grow Lights vs Fluorescent Grow Lights
    Personally, the ONLY 'competition' for LED grow lights are light systems based on the fluorescent tubes, especially fluorescent tubes like T5 and perhaps T8.
    T5 light tubes measure 16mm (5/8") in diameter and are known as one of the most efficient fluorescent tubes available on the market. They produce around 100-110 lumens per watt of spent energy, last 20.000-25.000 hours, come in different lengths (mostly as 2 and 4 feet tubes), operate slightly warmer than LED lights and are much cheaper than LED lights (5-10 dollars/euros per tube/bulb).
    LED Grow Lights vs High Pressure Sodium (HPS) Grow Lights
    HPS grow lights are very efficient - they produce 140 lumens per watt of spent energy, but they operate at higher temperatures (around 500¡ãF or 260¡ãC) and must be kept away from the plants. Also, their initial costs are somewhat lower than costs of LED grow lights, but HPS lights initial costs are higher than fluorescent lights' costs.
    Since they produce much heat during operation, they often require additional cooling, especially during summer. During winter, they provide both light and warmth to the growing plants.
    HPS are part of High Intensity Discharge (HID) group of lights that generally operate between 500 and 600¡ãF (260-315¡ãC) and produce at least 125-130 lumen per watt of spent energy. However, all these systems require the bulbs, sockets, reflector and a ballast, not to mention additional cooling of growing area during warmer months.
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    Call me biased, but for growing berries indoors, mostly strawberries and similar berries, one wants to plant as many plants as possible in available area and wants to cut initial and running costs as much as possible.

    LED grow lights are still being perfected, but keep in mind that LED grow lights from the '70s are still working! Many people complain that certain LED grow lights are good for green vegetables (lettuce and similar plants, including herbs) and are not as good for fruits and plants like tomatoes, eggplants and similar. Such LED lights often lack certain wavelengths, or they are too weak - red light, 600-640nm, is very important for flowering and bearing healthy fruits.
    If you like DIY activities, make two shelves, one with full spectrum LED grow lights and one with fluorescent tubes (T5 or good Compact Fluorescent Light (CFL) highly recommended) and test your berries during at least one full season.
    Long Story Short - for newbie indoor growers, there are all-in-one systems based on full spectrum LED grow lights. Feel free to test them.
    Fluorescent lights, especially CFLs are still very good option for grow lights - if low initial costs are important, forget any other grow light system.
    However, if you don't mind higher initial costs, full spectrum LED grow lights is a way to go, especially if one can find them on a sale :)


            
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