Whats wrong with my plant?

it maybe just nothing, but one of my plants is working on its 2nd set of ridgid leaves, it was lookin healthy but then today i noticed that at the very tip the leaves were turning brown, its only visible from a very close inspection, and is just the ver ver tip of the leaf, Should i be worried????

do you have them to close to the lights?
What kind of lights?
You should not give nutes until atleast 30 ds old.

oh sorry i forgot to specify,

under 2 spiral cfls

about 5 + inches away

only give em water, usually once a day sometimes every other

and they are in compost soil from the backyard

and i leave the lights on 24 hrs a day

i would say nute burn, though you arent using ferts, so i guess i wouldn't know, but usually when the leaf tips go necrotic thats what it is, if the lower leaves start getting yellow unevenly and more dead leaf tissue thats what it is, in wich case you flush with lots of water. otherwise hard to say without a pic...

as soon as I saw mogies name I knew she was going to bust that FAQS out lol, it really does have alot of info in there. I would just spend a whole day reading it, helps alot. The compost pile could have had a high nitrogen in it perhaps, I know some manures have this. if It gets worse i would change to a soilless medium, and mix a smaller amount of compost in it. If it dosnt get worse... grow on buddy.. grow on...

what u got here my brotha is a fucked up plant,, haha jk,, same shit happened to me on the top leaves under 24 hour light at so close range... id pull back the lights a bit or lessen the hours... preferrably pull back the lights a bit