Want to heat your mantis, but also want minimal light during the night? This can help stimulate the day/night cycle. Here’s the Night Bulb. Pretty cheap too.
https://www.petco.com/shop/en/petcostore/product/zilla-night-black-heat-incandescent-bulbs
https://www.petco.com/shop/en/petcostore/product/zilla-night-black-heat-incandescent-bulbs