Bunny,
For leopard geckos, eggs incubated at 79 degrees produce mostly females, eggs incubated at 90 degrees produce mostly males. I think it is different for each species. Bunny, it was summer for you, so the outside temperature was sufficient to hatch out eggs... here, it is too cold and the temperature fluctuates too much at night to leave them alone, hence the incubator. Should take 60-80 days to hatch.
For leopard geckos, eggs incubated at 79 degrees produce mostly females, eggs incubated at 90 degrees produce mostly males. I think it is different for each species. Bunny, it was summer for you, so the outside temperature was sufficient to hatch out eggs... here, it is too cold and the temperature fluctuates too much at night to leave them alone, hence the incubator. Should take 60-80 days to hatch.