1.   At night, they glow green.

2.   Even rocks that continue to radiate heat after the sun sets glow green when seen through the infrared lens.

3.   If it got into the monkey embryos and functioned, the embryo cells would glow green under a fluorescent light.

4.   Turn it on, and it glows green for writing in the dark.

5.   If it glows bright green, it must be hatchery produced.