Without Light for 2 days?

Its Possible my babies have been without light now for a cople of days. I was out of town and come home to a burnt hps bulb. I have no clue when it went out and the plants look ok , maybe a little droopy since the new bulb has been on.. My question is, will this have a major affect on their growth, they had been vegging for approx 15 days and all was well up to this point.

it may slow um down abit,but they should soon start to perk back up and grow normally....peace