Change to Hortilux blue mid flower? stress?

Hello all,
I have 2 600 watt HPS for flower and one bulb died, I had a backup Hortilux so I hooked it up. it says right on the bulb, its a super HPS. I can see a total difference. One side (the side without the Hortilux) is substantially more red. The Hortilux is white. Should I be concerned? Why is this happening and will is stress my girls?

I wouldn't be.

Nothing bad is going to come out of it. You'll just have a mixed spectrum which is a good thing.