The highest I could find... the ones HARDON used in that picture up there ^^^ not the huge long one.... but the other ones around it. I have those. And thanks HARDON, I havce a fan blowing on them. I need to get them closer to the light... I think the burns they have are actually from the light. i had them too close one night and that is what happened. So let me get to making my box better again lol... I'm gonna raise them closer to the light. i wouldn't want them streching for light... want them to be bushy not lankey. Thanks! I'll get new pots asap