- Mar 11, 2021
- Reaction score
So I built an irradiation chamber to purple up some bottles about 6 months ago. I have had some success getting a few to a nice light amethyst color but I wanted to know how people manage to get them so dark. I am using 2 60 watt tub germicidal bulbs with a workhorse ballast. I bought generic bulbs and not the name brand Philips ones. Am I not getting the dark color because the bulbs are inferior or do I just need to leave them longer? Some have been in there for 4-5 months going 24 hours a day. Any insight would be appreciated.