Germinated in light mixture of FFOF. Seeds havent popped yet. Should I water if neede

I've got 5 Northern Lights beans germinating in beer cups filled with a 2-1 perlite/FFOF mixture under a T5. Beans have been in the soil for about 46 hours now. None have popped yet. What Im wondering is; if they dont happen to pop before the soil needs watering should I wait until they do pop up before I water or is it cool to water as soon as the soil needs it even if they arent up yet? Thanks.

AnxiousNewbie

keep them wet my brotha... like yo women. its good luck for females too