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400W Metal Halide



After selling many different brands of 400W metal halide grow lights over the years we’ve fine-tuned our stock list to bring you only the very best selection; the Sunmaster range from Venture Lighting.

The Sunmaster brand are specifically manufactured and tailored for the horticultural market, ensuring that their range of lighting products offer high levels of performance and output the correct spectrums of light that plants need to thrive and survive.

This particular 400W metal halide has been tailored for the vegetative stage of the growth cycle. It outputs plenty of blue spectrum light which is essential for healthy development during this phase of growth.

The light put out by a metal halide bulb is measured in Kelvins, which is a measurement of the colour temperature (spectrum) emitted. The higher the Kelvin rating the greater amount of blue spectrum light the grow lamp emits. This 400W metal halide grow light is rated at 7200K (Kelvin) and is at the higher end of the scale, which means these bulbs put out plenty of plant usable blue spectrum light for optimum vegetative growth.

Experienced growers often choose to implement one 7200K metal halide lamp for every two sodium lamps in their growing environments to add blue spectrum light to their grow rooms. This setup is shown to be excellent at promoting the overall health and growth of plants and is considered by many to be the optimum lighting mix.

Our Opinion

Overall, this 400W metal halide grow light from Sunmaster is a market leading grow lamp that offers exceptional quality at an exceptional price. Highly recommended by us and our customers; we wouldn’t want to use anything else.

Wattage and Coverage

To give you an indication of the grow lights you’ll need we’ve included an estimate below of the amount of coverage each type of light will provide.

  • 250W – An area of around 0.6 to 0.7 metres squared
  • 400W – An area of around 0.8 to 0.9 metres squared
  • 600W – An area of around 1 to 1.2 metres squared
  • 1000W – An area of around 1.3 to 1.5 metres squared

***Please retain original packaging for your lamps to validate the 12 month warranty***

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