For some experiments I need to be able to filter out blue light with either special light bulbs or a screen around the bulbs. It seems an orange coating on the bulb or an orange screen around the bulbs will do the trick, but I need to filter out as much blue light as possible. Something like 99% would be good. Will an orange light bulb do the trick, to filter out blue light produced by the burning filament? How can I tell, any specifications to look for when it comes to orange light bulbs, or any inexpensive way to test the wave lengths of the light going through the orange filter or coating? Thanks.