not possible to get 8-10 lbs off 1 indoor plant. it would have to be lst'd until it covered a space about 8ftx8ft and lit by 3kw. veg time would be 3months or more and i still don't think it would happen. your friend is not telling you the truth. !!!!. in my 4ftx4ft space, using 1.4kw my best yeild (with 16-18plants) is 3 - 3 1/2 lbs!!!!! your friend probably meant 8-10 oz of 1 6ft plant. btw it is not very practical to grow a 6ft plant indoors anyway.