You are using 5 gallon buckets i assume. this should work, not a lot of people walk around there right? why are you putting gravel at the bottom? Don't hide them so much that you give them poor lighting. Do you know the technique of topping?? This will be important, esspecially the FIM Topping method. It will make your plant look more like a bush and draw less attention. And the harvest will be great! Peace