Call us on:

0117 9713000

400W HPS



This 400W HPS grow light from Osram is highly reliable and a very consistent grow lamp. Osram HPS lamps were the first lamps used to grow plants indoors and since that time they’ve continued to be a high performing market leading grow light.

Unlike metal halides that provide blue spectrum light for vegetative growth, HPS grow lights emit light in the red and yellow spectrums; the light spectrums that mimic the autumnal sun and the light spectrums needed during the flowering / fruiting stages of plant development.

Using a HPS grow lamp during the flowering and fruiting stages will ensure you’re delivering the correct usable light that plants need during this stage of their life cycle. Plants that receive the light spectrum they need during flowering and fruiting will grow to the best of their ability and produce more bountiful yields.

A standard that many growers use is a combination of HPS and metal halide lamps in their grow rooms, using two HPS grow lights for every metal halide lamp. This arrangement puts out plenty of plant usable light and will ensure optimum plant performance during all stages of growth.

As with all HID lighting, the bulbs do degrade over time. For maximum performance you should aim to replace your 400W HPS lamp around every 8 months.

Lumen Output

48,000 lumens

Our Opinion

Osram have always and continue to be a market leading manufacturer of high quality HPS grow lights. This 400W HPS is no exception and if it is used at the right time, during the flowering and fruiting stages, it will help boost your plants and flowers to their full potential.

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**

Your Cart