Quick question - 5 days old and leaf edges curling up

[Boradan]

I assume this is just the plant being too close to the light causing the edges to start curling up, but I just want to make sure.
She was very pale a few days ago, so I upped the feed slightly, but the colour is still paler near the veins although she has definitely darkened overall.
Anything else I should do?

RDWC system
Using Megacrop/Sweet Candy/Cal+Mag Pro
Under a self-built adjustable COB (at about 30W currently and 16" above the plant with a 120d egree lens and no/very little hotspot)

She is currently just under 5" tall, which is why I had the light lower to try and slow down the early stretching - she needs to be tied to a cocktail stick to keep upright.

The grow journal is in my signature and there is a spreadsheet with daily ppms/pH etc in the first post of that thread.

 

[LittleMT]

Yes the light being too close is causing this but this is ok, think of it as you are weening the plant to some good intense light. In the grand scheme of things these leaves mean nothing. This often happens to my plants in this stage as I try and put the lights as close as possible without burning the plant, and I find it varies with different strains.... You are doing ok.

 

[TheMongol]

Too much light...

 

[Waira]

Hey Boradan! So, this COB has a lens, not a reflector? it's still concentrating the light though I assume,.. at 16" it's too close, and I'm betting the RH% might be a bit low-? Seedlings definitely want less intense light and high RH%,... being that close to the pebb's, she's getting a little local boost to that,...
I had to move my AutoCOB's to about 24", clear through the first 4 true leaf sets, as they were showing too much compacted growth,...kept then about 20" until I ran out of room! Orange Diesel and Fugue State definitely show some nice stretch during bloom

 

[Boradan]

Yes, it's a lens, but the lens is unusual in that it has a Square footprint at 120 degrees - it is more of an even spread than a normal intense hotspot.

compared to

I have moved the light a bit further away currently, and dropped it to about 15W. I have also gone to 20/4 instead of 24/0.
RH is between 65% and 70%
I had the light as close as I did because she was veeeeeery leggy and had to be propped up using a cocktail stick when only 4 days old, so I assumed the light was too far away to induce that..

 

[Waira]

Huh,.. well sometimes even my Sun grown seedlings do that, but they are also shaded by some window screening material,....light isn't the only thing that can cause that too,
.... nice lens! Maybe remove it for this early stage, and tinker with height some,... symptoms are so mild though, see what a few more days brings,...