I assume you are using a timer....what time do the lights come on and go off?As for the lighting, we will investigate that. Last autumn prior to using lights to supplement the day length, all of our research showed it would be OK, but there may be something to what you suggest. We will definitely follow up on that.
Do you adjust the timer so they are not getting more than 16 hours in the summer?
They need that 8 hours of darkness.