2/4 Are Female...pics Included

i put one of my ice plants into 12/12 for 3 days and then put it back onto 18/6 and it showed sex a week back into 18/6. The second biggest plant also laid down its sex without being placed in 12/12. Im very happy right now and have two more growing.
Do you think it would be a good idea for me two put the two females into 12/12 now as i cannot grow to over 2.5 - 3 foot.
And if you look at my pics, you can see that the smaller female has curly tips drooping to the floor...does anyone know what this could
LOOK AT THE PICS< THERES NOT JUST ONE!
be???


https://www.rollitup.org/marijuana-pics/file.php?n=3740&w=l
https://www.rollitup.org/marijuana-pics/file.php?n=3744&w=l
https://www.rollitup.org/marijuana-pics/file.php?n=3742&w=l

The temp is usually from 25-30 degrees (79-84f), and humidity is usually above 40% although it does tend to fluctuate from very dry, to pretty humid around 55%.
How important is the humidity to my plants?

wots wrong with my pics lol??? i took em with my fone, wasnt expecting great quality with 3.2 mega pixel?! but yeah, the plants are a lil nute burned but only two of them, i had distinguished that so far, but could those curly tips be more nute burn, i thought it is either that or they have been over watered.
Its not foil, its a very reflective sheeting, like mylar, but not the white sheeting, it is like foil i suppose, but it gives the same reflection from what you get off a light reflector like mine and many others. I have a 400 watt hps.
but if you could read what i wrote about flowering the plant because i want to start as soon as possible.