Re: Light???
read somewhere they have 20,000 hours lifespan then start losing its strength ,i change mine every year or so. just my preference mate.
as said though they do start to go slow when used for too long.
yeh i use bio-grow ,b-bloom & top-max(top-max is just a exspensive flavour enhancer,but hey what a flavour)
i use in conjunction with bio-bizz all mix,but use b-bizz light mix for clones seeds as lower n-p-k, & been getting good results from using them.
would highly reccommend them.