I like to mist my trays as they are germinating or if the seedlings are tiny. It (misting) also is an easy way achieve good soil contact for tiny seeds that are surface sowed, like impatiens. I do bottom water my trays, so I use a watering can as well.

I find that the best place to store the water is on top the light fixture. I top up after each use and let the fixture "warm" it up for next time.

I like to let the water sit, sometimes there is just to much chlorine in the water, just don't want to take a chance on tiny seedlings.
I use room temp water.

Yes, me too. I usually water/mist in the morning so it has sat on the light fixture for almost an entire day.

Joanne, I have one of those hand pump pressure misters. The mist is so gentle and does not dislodge the seeds.
You do have to clean the O rings once in a while. I also take a bit on vasaline to the O rings before I put it back together.

Yes, I love those. I use mine for Neem Oil, so I guess I should buy another for water

I keep water jugs sitting out then use those to water my seedlings with I do bottom water and have a mister sitting on top of my lights like you it just kills me to water with tap water straight out of it when I run out of water from watering the pots I'm transplanting with with the same water. I keep my jugs by the furnace grate to keep the water warm they are all lined up right beside it

That's a lot of WS babies you got there Joanne figured you just grow petunias