Natural sunlight stimulate hormone production and a lizard that has not been outside ever, or in long while is likely to become stressed, agitated and unusually agressive. The first time I brought my dog tame six foot iguana out into the sun, he nearly ripped my finger off in a hormonal rage. Consider akin to a steroid shot. Make sure that your lizard has access to shade, shelter and water, and slowly increase the amount of outside time until she calms to it.