I took some product pictures with a lightbox but the pictures all turned out with a pink background. Why?

What did I do wrong? I changed different light bulbs and camera but the background is a light pink color when it's suppose to be bright white. I took some product pictures with a lightbox but the pictures all turned out with a pink background. Why?Did you set your white balance for the type of light you were using? If you didn't bother with testing the white balance, it's hard to know exactly what went wrong.

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