>>680927>>681003I've now gone ahead and replaced the thyme under my grow light with the tomato, but as you can see it's not sitting very ideally.
Temps there are around 18-20°C which should be enough and not require extra heating.
(The thyme went onto the rack I recently built if someone remembers, which I meanwhile extended with some alu foil coated press boards to maximise daylight, and relocated on a WSW window, under which other thyme has been doing OK, pic of that in next post)