• CMH Bulb Lumatek 315W Agro 3100K 32500lm 12000h lifespan | CMH Lighting Set

Growlight CMH Lumatek 315 Watt

The Lumatek CMH 315 Watt grow lamp is a precision-engineered replacement bulb designed exclusively for the Lumatek 315W CMH electronic ballast. Built around a PCA ceramic arc tube and a purpose-developed horticultural gas blend, it outputs 575 µmol/s PAR and 32,500 initial lumens at 3100K Agro spectrum with a luminous efficiency of 104 lm/W. A CRI exceeding 90% delivers near-sunlight spectral coverage across the full visible range for both veg and bloom. PGZX18 twist-lock base for secure installation. Refresh your CMH fixture — order today from Plant & Flower.

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Lumatek CMH 315W Grow Lamp — Ceramic Replacement Bulb for Indoor Cultivation

The Lumatek CMH 315 Watt Agro 3100K is a dedicated replacement lamp engineered to maintain peak performance in Lumatek CMH fixtures. When your existing bulb reaches the end of its rated life or PAR output begins to drop, this lamp restores full spectral coverage and photosynthetic efficiency without replacing the entire fixture.

PCA Ceramic Arc Tube Design

At the core of this lamp is a poly-crystalline alumina (PCA) arc tube that withstands significantly higher operating temperatures than conventional quartz tubes. The elevated temperature enables broader spectral emission and improved colour rendering. PCA also resists chemical interaction with the internal gas fill, which stabilises the spectral mix throughout the lamp's 12,000-hour rated life and minimises PAR depreciation over time.

Key Specifications

  • Wattage: 315W at 240V, lamp current 3.15A.
  • Initial lumens: 32,500 at 3100K with a luminous efficiency of 104 lm/W.
  • PAR output: 575 µmol/s — delivering usable photosynthetically active radiation across red, blue and green wavelengths.
  • CRI: greater than 90%, supporting terpene and essential oil development through balanced spectral input.
  • Ignition: pulse-start technology for rapid warm-up, reduced restrike time and extended lumen maintenance.
  • Base: PGZX18 twist-lock, compatible exclusively with 315W CMH ballasts.

Full-Cycle 3100K Agro Spectrum

The 3100K colour temperature positions this lamp in the Agro range: a warm-toned spectrum with enhanced red and orange output for flowering, combined with sufficient blue and green wavelengths to support vegetative growth. This eliminates the need to swap lamps between growth phases. Growers who prefer a cooler vegetative spectrum can opt for the 4200K Daylight variant, which emphasises the blue portion of the spectrum for compact, vigorous growth.

Ships fast from our Belgian growshop. Considering an upgrade to next-generation lighting? Browse our selection of Bionic LED grow lights.