lower leaves crisping and dropping off

it started a few days ago when put under 600w dual spec 18" from top of plant 24/7 ventilation any ideas ? help wud be much appreciated

it's like the leaves are burning but only the lower one's i would think the top one's would burn burn first ? i'm confused

We need pics man ! ! !

soz m8 dont have usb lead for phone but been reading sum forums n it looks 2 b mg def

Your bottom leaves will die and crisp if there is no light getting to the bottom for them as the plant needs no reason to keep em but without a pic i dont really wanna b sayin its fine wen it could b a defiecency but aslong as its only the bottom leaves and the rest look green and lush id say your ok

thanks for reply but its working its way to top of plant now upon closer inspection theres brown dots on the leaves to start with then they crisp n yellow

r your leaves white/ yellow patches m8 if so it mite b spidermite the wee ba****ds

they look sorta normal but with brown specs then they yellow n fall off

if ur plant is bushy with big fan leaves it might block light 2them how big is she cant really picture it but its pro nothimg 2 worry about unless its near the top then its somethin else

by any chance r u putting water on ur leaves when ur light is on this also cuzs them 2 turn yellow an die

no water on leaves and plants not bushy

will post pics as soon as new phone arrives wbl (hopefully)