they are going to need uvb. so, if you dont want to invest in a uvb, you are going to have to take them outside every day, and if you are not able to watch them , you should probably build or buy a small screen cage (preferably critter proof). uvb does not travel well through glass or plastic, so just keeping them in the window will not be sufficient in their current cage, one thing you could do is set your cage up with a tiny plant that rises above the top of the cage but is trimmed so no part hangs out past the sides of the cage , that way if they fall they will fall inside the cage but should offer some uvb(when they climb above the top of the cage). i find ffs (preferably hydei) are easier to deal with and probably better digestively than pinheads. imo, they should have food available during all daylight hrs. but if that is not possible you can probably get away with 3-4 healthy feedings a day. i would mist their cage several times a day, try to avoid spraying the chams directly.have you already supplemented? usualy i would avoid supplementing for the first several weeks, but turning white is not a good sign. more info would be helpful. do they actively eat and drink? jmo