Bottom leaves yellowing and dying...

Sooo after moving my plants indoors under CFL and regular fluorecents for about a week, the lower leaves are turning yellow wilting and dying, while the top of the plant is dark green and healthy, this is only happening to the leaves that do NOT have 5 tips.
The plant looks nice and healthy, bushy as hell at the top im justworried about the bottom.

(6-7 nodes on each plant about a foot tall, somewhere around a month old from seed)


I have several questions.

1. Are the leaves dying because they aren't getting direct light? ( I have my lights right over the top).

2. Or are they Nutrient Deficient? I haven't put in any nutes, since im growing in Miracle Grow potting soil, and it says it feeds for up to 3 months and ive changed the soil (transplanting) twice already.

3. Or are these tri-tipped leaves just supposed to die like the clover looking leaves and the singular leaves?

Short and Sweet (condensed version)
Light
Nutes
or Nothing?

Also, Will losing these leaves stunt the plant? or are they just dying because the plant doesn't need them anymore

mine did the same didn't think much of it.
With miracle grow soil over nute is more likely than under nute.
On most the medium sized plants I have experienced with this is generally normal though, those first leaves will yellow badly but never completely die as the plant matures. It seems to be somewhat the same for marijuana, I was once told they are kind of the junk filters for the rest of the plants, and all the "bad stuff" goes to them and causes the bad coloration.
As long as it doesn't spread I wouldn't be too concerned though.

Ph? Ppm? When did you flush the last time? do you test your runoff? give more info ... couse it could be anything, but in if I had to guess, I would say N deficiency.....But i been wrong before