Seedlings

[lichenous]

I have some black from Tula tomato seedlings, and after about 13-14 hours under lights the cotyledon leaves will start to point upwards rather than outwards. Does this mean they've pretty much had enough and are trying to absorb less light? Are they being stressed? They don't appear unhealthy.

I've also got some leek seedlings going, and I've read that some people trim them so that they're easier to manage. But, does this affect their growth as adults? Do the seedlings put more or less effort into stalk growth when the leaves are trimmed?

Thanks.