Fan Leaves Dying!! [Pics]

Hey all, could you help identify what's wrong with this girl? She's a mother whose been regenerated once and is vegging right now. Under a 150W HPS light with fans and temps around 70-80.

I'm suspecting its either a calcium or maybe boron deficiency. What do y'all think?

Not that i know much,but those leaves look real light. You got a soil kit? They have ones that let you test the ph and nitrogen, phosphorous, and potash individually. Like I said im no expert. how close is your light?

No, I don't have one. The light is about 6 inches away

You can grab a rapitest for less then 6 bucks at any garden supply. It will tell you alot.

There anyone who can tell me if this would be a calcium or boron defic?

to me it looks like three things: Magnesium deficiency = the nitrogen is unable to react with the chlorophil because there is no available magnesium. The tip burns indicate over-feeding or over watering. Also there is a chance that there is magnesium in the potting mix but there is no nitrogen present to green up the leaves.