- The 315W 10000K QMH (Quartz Metal Halide) lamp is a mercury-vapor lamp that is enclosed in an arc tube constructed of quartz.


- The 10000K QMH emits a crisp white spectrum that is high in ultra-violet (UV) light.


- Plants exposed to adequate amounts of UV light experience significant increases in anthocyanin.


- Anthocyanin is a purple substance that protects plants against certain pests resulting from abiotic stresses caused by exposure to UV radiation and extreme temperatures.


- Anthocyanins are not present in the leaf throughout the growing season, but are actively produced towards the end of summer.


- This is why we recommend use in the last 2-3 weeks of flower.


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