Northern Lights Burnt Leaves ... Advice Appreciated (Pics Attached)

These Northern Light beauties have been growing for about 3 weeks now ... the big one has and the smaller 2 are about 2 weeks. I watered my plants and left them overnight with the light switched on to stay at my girlfriends and i came back in the morning and the larger plant had curled on the leaves and got yellowish burnt colourings. Please could you tell me if the problem is that the plant got burnt overnight or if it is due to some other problem? And also if my plant is going to be ok and anything i can do to heal them if they are burnt ? This is my first ever harvest. Set - Up explained below. Thanks a lot for any advice.

Bob

Set-Up :

600 watt hydrolux hps light
canna coco medium
no added nutrients or fertiliser
5l buckets

First off welcome to www.cannabis.com
If your lamp was to close it may have scorched them. It is most likely the case if it happened over night and just to the top of the plant. Not much you can do for her, whats dead is dead. The rest of the plant will be fine, or it should be. Any pictures ?

Yeah ive got pictures and fort i uploaded them but they havent shown up ... do you know how to get them on

click post under the pictures. there are two spots gotta upload then hit the bottom post button

Think the pics shud be on now ... thanks for the reply

Bob

Could you have spilled something on them? Nutes maybe?

Nutes? as in nutrients ? no cos i dont use nutrients in the soil ... all ive used is the canna coco medium and thats all in the pots and then water ... i spray the water on and over the plant so cud the water have magnified the light and burnt the leaves that way ?

Yes that would be my guess. I never folair as burning usually accurs. A fan may help there health aswell. I hope to see you stick around. You should make a grow journal here so we and you can see the plants grow. Once again welcome.

Yeah dude that'd be cool ... may have to do that ... ill get a fan for in there ... as this is my first crop how long generally would a plant take under a 600 watt bulb to grow from seed to harvest ??? Northern Lights seeds. Just to get a general idea. Thanks for your help.

about 3 months.