since you can grow clones AND veg both under 24/0 or 18/6 its not the end of the world but its better if it doesnt leak any at all...think of a easy diy way to stop the light, remember, light cant travel around corners so try to think some typr of barrier up...good luckits the light from my clone box (24/0) thats seeping into the vedge room (18/6).