On Thu, 03 Oct 2019 17:42:16 +0100, Tim Streater wrote:

In article , Commander Kinsey
wrote:

that on the instructions. I guess there's IR in sunlight so plants maybe make
use of it.

IR: also known as 'heat'.

Surely not required for the plants, as the room is heated by a greenhouse heater. Or do they insist on absorbing some through radiant energy?