Hi there.. if your light has been too close, then it can be due to heat .. I've had this when my plants grew too close to a light as well..
on the other hand (and i don't think your plant is at that point in her lifecycle yet), the pistils will turn amber as well, just like the trichomes, when she's getting towards the end of flowering.
Given you've already raised the light, i would just recommend keeping an eye on it to verify that it's not getting worse.
happy growing