*Lux levels Source: Lighting Indoor Houseplants - University of Missouri Thank you to our wonderful house plant fans for their tried and tested grow light methods and recommendations. This is where a light meter will be useful using the lux measurement as a guide. High light plants 10,000 lx and over (for example cacti and succulents)ĭistance - on the whole LED grow lights should be positioned about 12 inches away from plants, but the distance will depend upon the wattage of the bulb, the type of plant and it’s light intensity requirement, and the ambient light in the room. Medium light plants 3,000 - 8,000 lx (for example Ficus, Pilea, Peperomia) Low light plants 500 - 3000 lx (for example Sansevieria, ZZ will tolerate low light, but will grow better in medium light) Lux (lx) - a measure of the amount of light over a surface area - this is a useful way to measure how effective your grow light set-up is. ![]() For good foliage and root growth a cooler colour light with a kelvin rate of around 6500k is optimum. Lower K numbers are warmer more red coloured lights (good for stimulating flower growth), higher K numbers are cooler more blue coloured lights. Kelvin - Light bulbs will often be rated with a K number, this is the measure of the colour of light. LED bulbs are more energy efficient with a lower wattage, and will last longer than incandescent bulbs with higher wattage. ![]() ![]() Watts or wattage (W) - the amount of power which a piece of electrical equipment uses.
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