Sorry...I meant 6500k for the second set of bulbs. The real question I have, is should I use the 4200k or 3000k for the first half of the bulbs?

A seed starting tray that size would start hundreds of seeds all of one variety. If you use it for mixed seed starting when the first seeds germinate and you need to move them to a cooler place with more air circulation and better light, do you just sacrifice all the seed not germinated? Al

The trays I use have six-pack inserts. I always plant one variety in each six pack. The top comes off and the six-pack goes under the lights when they germinate. If some are slower to start than other's then they stay covered until they germinate.

My set up consist of a metal multi shelved bakerÂs rack purchased at LoweÂs, just the right size for heat mats with thermostats , 1020 trays with covers, and 2, 2 bulb shop light fixtures hanging for each self (above). I use the bottom and topmost shelves for storage and the middle racks for seed starting (arrange to your liking). I purchased full spectrum daylight bulbs instead of plant grow lights and hang them about 3" inches above the seedlings for 12-14 hours per day. I also use a small circulating fan to provide air movement for about 1 hour per day when the seedlings are up

I generally use "community cell packs" for starting seed, picking them out at the 2nd set of true leaves. The plastic trays that hold (6 pack) peat pots are the right size for community pots so save those. IÂm also trialing paper pots (PotMaker) made from black & white newspaper; they last about 5-6 weeks and are a good way to "bury bad news" Â just plant all in the garden! You can also make them using grocery store cans of various sizes and freezer paper tape to hold it together.

Happy Seed Starting!

Tommie