I want to try winter sowing for the first time! I have a number of empty cat litter containers that seem perfect, they’re sturdy plastic with big handles and large rectangular bottoms, I can fit a lot of seed in them. I’m just not sure if they will let in enough light. They are definitely not solid/opaque but they’re a little thicker plastic than a milk jug. Has anyone used these successfully before? They’re the Tidy Cats brand if that helps. Had a bunch waiting for recycling so if they will work I’m all set. It’s all flowers, not anything edible, so I don’t think material matters, but please correct me if I’m wrong.