ok quick question im at day 42 of flowering first grow my leaves are starting to turn yellow at the bottom but my main stalk and branches are starting to turn a redish color also i believe its normal ?

Can you post up a picture so we can have a look at it? It doesn't sound too abnormal but a picture is worth a thousand words.

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your leaves shouldn't be turning yellow not after 45 days what kind of growing light do you have and how old is the bulb in it.

Lower leaves yellowing in the 7th week (days 42-49) of flowering is totally normal. Bloom nutrients do not contain an abundance of nitrogen, which will cause the larger fan leaves to eventually turn yellow in flowering.

6/26 watt cfls 2700k 1 small fluro for 6500k end of spectrum all on 1 plant need better lights but hey the plant looks great but just wonderin the leaves wernt my worry its the plant stalks starting to change color

Plant stalks/stems turning a purple/reddish is phenotypical for many plants, often brought on during nitrogen deficiency. This would be normal during late flowering. Just make sure it isn't "splotchy", but something you see more uniformly on the plant. There are certain fungus/molds that can cause purple splotches to show up, but I don't think that is what you have. Pics would help.

How are the temps during lights out is it getting to cool? Are they purple red like thin lines?

Did you change anything lately like nutes or city water changed?

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sry about pics cams horrible and busted but just get nervous my plants are like my kids

The lights you have won't cut-it I use a 500 watt to start them then i transfer them to the 1000 watt to grow and bloom are you grown in dirt or hydro. PH level might be to high. To cold or to hot in room to much or to little fertilizer more than likely it's your lights.