why are the leaves so dark?

I switched from a 400 hps to a 180 watt magnum LED, I never noticed it before. I turned on regular light and not LED and was shocked at the color of the leaves.

starting to fade, its natural....enjoy....peace

It's an alien!!! Don't be fooled those buds are really torpentine torpedo launchers.. mark V.

On my last (first grow) I had a plant that had the same thing. I forgot the name of the strain but all the top leafs had a purple tint to them and almost looked like they were coated with wax. Smoked good though

I am guessing your lights off temp is at least 15 degrees cooler.

Looks to have a tint of purple in the strain, and or dramatic lowering temps as suggested, looks good i would'nt worry at all.

its cold.... my fucker looks black..

i had some medijuana, aka herijauana, that one pheno turned near black. thats how they faded.

thanks I wasn't sure, I put a heater in room to make up for the loss of heat from not having HPS light. so I knew it wasn't a heat issue I wanted to make sure it wasn't over feeding.

Could be cold, Could be genetics or less likely deficient by the looks of it.

hey, last night, i noticed that at 7 weeks, my two aurora indicas are getting purple showing on the tops now. looks neat. maybe done by christmas day??? (9 weeks then).

MMMMMM Purple!