soil drying to fast

so i started my veg last night on an 18_6 cycle in 9cm pots, now at the moment ive been advised not to use nutes just water, now im using a spray bottle to water my seedling but with me vegging under 2 x 600w the top of the soil seems to dry up within an hour or 2, i have no problem spraying them every couple of hours, but is that ok?? maybe i should pour some water in. what dya think guys?

A seedling in that size pot , should have had the soil completely soaked when seed was planted.
Then not touched till it was light to where you can tell that it was almost dried out. Then water completely again.
The pots small enough to get rid of that amount of water between evaporation and the seedling to not worry about having the medium too wet too long.

it was soaked soon as i planted the seed, the whole of the soil doesnt go dry its just the first 2 inches. my lights come back on at 6pm and i shall feed them properly then, how much should i pour into a pot that size?