Flushing in the light during dark period.

O.k, need to flush my babys as they are near harvest and think they may have slight nute lock. The question is, I need to do it today reali but the light doesn't come on until 7. Is it going to stress them out or have an adverse effects if I take them out of the dark a few hours before light and do a flush??

Cheers

Why can't you just wait til the lights come on to water them?

I can water them during the dark period but that's not what I'm asking. I need to FLUSH them I.e flushing the soil with about 15litres of water. As the pots are sat in trays I can't do it in the tent, they will need to be taken into the bath or shower to do it.

just wait till lights on