Sometimes marijuana use can lead to dependence and problems with addiction. Dependence according to the DSM-IV, the diagnostic manual of psychiatrists, dependence requires 3 of 7 symptoms in the same year. These symptoms include tolerance, withdrawal, using more than intended, being unable to cut down, increasing the time spent using, giving up other life activities, and using despite consequences. The 2003 National Drug Use and Health (NSDUH) study reports that 4.2 million Americans are dependent or abusing marijuana Of 42,000 people surveyed in a 1998 study, 23% were diagnosed with abuse and 6% were diagnosed with dependence.Marijuana smokers do experience withdrawal symptoms, although often these are not as physical as those for other illicit drugs such as cocaine and heroin. These withdrawal symptoms include irritability, a depressed mood, lack of appetite, cravings, anger, and restlessness. These symptoms can be as severe as tobacco withdrawal.
LEDs are nice, but usually expensive to start off with. CFL (compact fluorescent) bulbs work great for a small grow. At Home Depot or Lowes you can get the high lumen (1 lumen = 1 candle output) bulbs (~2500 lumens) for under ten bucks and two of them will grow two plants nicely or one plant amazingly.