its not that good but it works im not worried about light leaks because theres no windows and the light is only on when me or my friend go's into that room!!! and i also am using a timer and have it on 18/6 for now!! and you should get something that tells acurate temps cause thats also a facter but not really with cfl's

and if you look behind the fan there is a filter to collect anything bad in the air and smoke just in case we blaze in there witch is sometimes