This version of the high bay fitting uses special Sodium lamps called Growlux, Planta, Aggro and Plantstar.

You can only have 400 watts.

There is a 600 watts version but it is not very common these days as the 400 watt version offers very similar performance for much less cost if you want the 600 please call for pricing.

These Lamps are specifically designed to greatly enhance plant growth they do this by producing more blue radiation in their spectrum which optimises plant growth giving greater volume, stronger plants, good leaf and bloom colour as well as developing extra branching.

The lamps are not designed for general lighting and should only be used for horticultural purposes.
They are ideal for hydroponic systems.

Yes they are the ones used for cannabis growing by naughty people.

Also available in a lowbay fittings.

There is a substantial discount for 5 fittings.