I read on here that fluorescent lighting can reduce IS as well as sunlight, so I have been keeping my curtain in my kitchen closed as well as my main light in my kitchen off because it is fluorescent. Then it dawned on me that this might be silly seeing as I am either capping and reducing or at the least reducing the batches anyway. If I am making Colloidal Silver that I am reducing anyway, can I keep my light on and open the curtain? The only brew I would have to keep the direct sunlight from hitting or the fluorescent lights off of would be if I was making Ionic Silver, right?