Hi all,
A part of my greenhouse is in the shade of my house. I this part of the greenhous I grow my Ariocarpus. They grow well, but make only few flowers. So I decided to install artificiall light. The part of the greenhouse is about 2.30x2.30m, the lamp is about 1m above the plants with a "wide angle reflector". The lamp work with a Philips 400 Watt SON-T Agro.
The artificial light is on from 7.00 AM to 6.00 PM, always when the natural light is less than 10'000 Lux. During wintertime I will stop the lamp.