ive heard of a few people using 24 hr lighting but i dont know of any where in the world that gange grows that has 24 hr sunlight most people ive spoken too say your plants will just get stresed under 24 my plants were started in the greenhouse for a couple of weeks then brought indoors on 18/6 for 4/5 weeks now theve been on 12/12 for two weeks now im no expert this is my first grow but my 4 plants must have 50 /70 buds between them ive just got to keep runnin around tryin to find a dealer with a smoke {hard these days} for another 8 weeks 6 weeks growin and two weeks ish dryin cant wait check out pics from a few days ago