DAYLIGHT 315W CDM BALLAST

Description

DAYLIGHT 315W CDM BALLAST is the dedicated control gear for 315W Ceramic Discharge Metal Halide (CDM/CMH) lamps, delivering the precise electrical characteristics that these advanced grow lights require to produce their exceptional full-spectrum output. We have been recommending CDM ballasts and lighting systems to UK growers since 2017 as the technology that best bridges the gap between HID intensity and LED spectrum quality.

Why CDM Technology Represents a Step Change in Grow Lighting

Ceramic Discharge Metal Halide lamps operate on a fundamentally different arc tube technology than conventional HPS or MH lamps. The ceramic arc tube withstands far higher operating temperatures and pressures, producing a plasma discharge with a colour rendering index (CRI) of 90+ and a spectral profile that includes genuine UV output alongside rich red, blue, and white wavelengths. This broad, sun-like spectrum drives photosynthesis with exceptional efficiency, accelerates terpene and essential oil production in aromatic crops, and supports compact, healthy morphology without the stretch associated with HPS cultivation. At 315W, CDM technology produces more usable photons per watt than equivalent HPS, making it highly cost-effective for single-light home grows or supplemental lighting in larger rooms. The dedicated 315W CDM ballast is optimised specifically for these lamps — using a generic electronic ballast will compromise lamp performance and lifespan.

Compatibility, Installation, and Pairing with 315W CDM Lamps

This ballast is designed for use with 315W CDM/CMH lamps in compatible fixtures. Ensure your chosen lamp and reflector are rated for 315W CDM operation, as the lamp operating frequency and ignition voltage differ from standard HPS systems. The ballast provides the correct ignition pulse, running current, and frequency for the ceramic arc tube’s optimal operation. Mount the ballast outside the grow space or on the tent frame to manage heat output, and use a compatible IEC cable set. Pair with a 315W CDM lamp in the 3100K spectrum for flowering, or the 4200K spectrum for vegetative growth and propagation. A single 315W CDM unit covers a 1m x 1m canopy effectively and delivers excellent penetration depth. Browse our full CDM lighting range for lamps, reflectors, and complete CDM grow light kits.

Browse the full range: Explore our complete New Products range at The Horticulture Company. Also in this range: IONIC CALMAG PRO, UGRO XL BASIC 70LITRE, EXHALE CO2 BAG, PLANT !T YOYO (PACK OF 8).