CMH / HPS

Why choose CMH and HPS grow lights?

CMH and HPS grow lights have long been trusted by indoor gardeners for their reliable performance and high light output. Ceramic Metal Halide (CMH) lamps produce a balanced light spectrum that is well suited to vegetative growth, while High Pressure Sodium (HPS) lamps are widely used during flowering for their strong light intensity.

Paired with a quality ballast, reflector and suitable ventilation, these lighting systems can help create an effective growing environment for a wide variety of plants.

Explore our lighting range

• Complete CMH grow light kits.
• HPS grow light kits for flowering plants.
• Digital ballasts for stable lamp operation.
• A range of wattages to suit different grow spaces.
• Lighting systems from trusted horticultural brands.

How to choose the right grow light kit

The best lighting setup depends on your grow area, plant requirements and growing goals.

• Small grow tents: Lower wattage systems provide efficient coverage without generating unnecessary heat.
• Larger grow rooms: Higher wattage lighting delivers greater intensity for larger growing areas.
• Vegetative growth: CMH lights provide a broad spectrum suitable for healthy plant development.
• Flowering: HPS lights are commonly chosen for their high light output during bloom.
• Complete setups: Select a kit that includes compatible lighting components for straightforward installation.

Getting the most from your lighting system

• Choose a light output appropriate for your grow space.
• Maintain the recommended distance between the light and plant canopy.
• Use adequate ventilation to help manage heat.
• Replace lamps according to the manufacturer's recommendations to maintain performance.
• Monitor temperature and humidity to support healthy plant growth.

Shop lighting kits and ballasts at Dr Greenthumbs

Browse our Lighting Kits & Ballasts collection to find premium CMH and HPS grow lights, digital ballasts and complete horticultural lighting systems. Whether you're growing in a compact tent or a larger indoor garden, you'll find dependable lighting solutions to help your plants thrive.