Light cycle sensitivity

What kind of errors am i allowed with my light cycle. I just switched my seedlings from 24/0 at 6 days old to 18/6? is this ok? Also i need to bring them with me on a trip which will require them to be in the trunk of my car for 4 hours during a time they should be receiving light but when they get to destination things will be back to normal. this will happen once in november (trip there on friday and trip back a week later) and again in december (trip there 15th trip back 15th) how should I handle this situation? because ill be driving and my current dark cycle is from 1-7am and theyd be in the dark from like 6pm-10pm

move your plants during your 6 hours dark period, put the in a box where no light can come in, and make sure you dont take them out of the box until 6 hours

oh I meant to say they will be moved during the Veg cycle,

Ask a really good friend that you can trust to help ya out...But only if u trust him being in your house when your gone...I only have a handful of people that i can trust to do that one is my fiance and one is my brother....