While a few of the crops we grow (both flowers and veggies) are direct sown in the soil, the vast majority of them are actually started as transplants. Starting seedlings as transplants gives us a head start on the season, allows us to control the growing environment to reflect the seeds preferred germination temperature and moisture level, provides us with fully planted and uniform beds, and protect the seedlings during their most vulnerable stage. We begin indoor sowing of certain seeds as early as January!
These timers are amazing! I hook my grow lights up to them and schedule on off times for a set it and forget it propagation operation. Each timer has 2 outlets allowing independent control of 2 different growing spaces.
I've prefer the Winstrip tray to all other seeding trays. It is strong (think last for ever) and the air pruning effect helps to build strong starts by preventing plants from becoming root bound. I use 128s, 72s, and 50s with the short indestructible bottom trays and dibble boards/ plug poppers.