Underfloor heating is the way to go, believe me. It's cheap as well. Much cheaper than those mats they sell specifically for propagation. Your root zone temps are more important than your ambient temps to a large degree. Underfloor heating's saved my ass a couple of times. The difference in growth ...

Bridgelux gen3 strips are very good value for money Get the wider version if you can I do not reccomend mixing colors If your goal is to flower with these then I suggest 3000K If you can get your hands on CRI90 versions then they are better for flowering Tek, why do you recommend the standard width...