Metal Halide vs High Pressure Sodium for plants?
I found some in the attic and it’s rainy season right now so will use them for plants.
Which is better Metal Halide or High Pressure Sodium or both maybe??
Thank you so much!!
Metal halide is good for growing.
http://www.jasons-indoor-guide-to-organic-and-hydroponics-gardening.com/indoor-grow-lights.html
Sodium light is primarily just in the yellow frequency. That isn’t the ideal frequency where chlorophyll absorbs best.
http://en.wikipedia.org/wiki/Gas-discharge_lamp
GLOBAL TECH – LED SUPERIORITY OVER HIGH & LOW PRESSURE SODIUM, MERCURY VAPOR, METAL HALIDE.mp4
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