they're now 5 footers, had them under a normal fluerescent for about 1 1/2 months, ehich at that time they stood up about 18 inches, then under the 1000 lamp 18 hours for another 5 weeks,,,I think by the time they're done they'll both be close to 6 ft,,hope I have enough space, my room is only 6 1/2 feet high,,lol,,can't wait for the results,,