Thank you very much.
Actually, I have changed my approach and I'll give them some more light. I'll try to find some CXB-chip-based lights at 6,500 Kelvin. And I'll add some LED grow lights which I already have as my tomatoes just started blooming.
Namely Sophie's Choice and Nelinka. I want them to have fruits indoor and they'll go onto the balcony as soon as the weather is warmer. I reckon a bit of generosity won't harm.
I now understand that there's quite a difference between "stretching" and "leggy".
Milan HP