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The jacket of this double-ended lamp is made from quartz glass
spherical aberrations
This space can be open fields
black spot
HORTILUX Metal Halide out performs most grow lamps because of high initial light intensity and consistent spectral output
Apera GroStar GS4 pH/EC Combo Pen Orca The jacket of this double-endedAI21040 GroStar GS4 pH EC 500ppm 700ppm & Temp (5 in 1) Combo Pen Lab grade instruments designed specifically for growers! Includes: 2 year warranty (instrument) 1 year warranty (probe) pH 7 & pH4 calibration solution (50ml bottle each) 2. 77 EC calibration solution (50ml bottle) KCL storage solution (10ml bottle) Lanyard and user manual Features: Measures pH, conductivity (EC and 500ppm 700ppm) and temperature (5 in 1) Compatible with all GroStar
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