I WAS RESEARCHING full spectrum light for my finches and i came across this page
Winged Wisdom Pet Bird Magazine - Bird Lighting Hotspots - Pet Birds
and it said this (there more you can read )
Many people are stuck in a rut when it comes to thinking about lighting for their birds. They think that the main purpose of full spectrum lighting is to provide their birds with a source of Vitamin D. Some people think that Vitamin D is part of the rays in sunshine. Therefore, common wisdom has said that given a few hours a day of full spectrum light, birds will be healthful and happy. The truth of this matter is simple: birds require a regular photoperiod for health, and receive all of the Vitamin D they require from balanced dietary sources. The rest is a myth.
so i did more research to find out where vitD2 (calciferol), and vita D3 (cholecalciferol) comes from and i found this
Lady Gouldian Finch .com - Vitamin D in Cage Bird Nutrition
Vitamin D2 occurs mainly in plant sources in nature
Vitamin D3 is found only in animal products such as eggs, milk, insects, and liver.
and i found this
DIETS FOR FINCHES AND SOFTBILLS SIMPLE OR COMPLICATED? - Robert G. Black
Nutrients are widespread in foods, and any mix of both plant and animal products can provide a complete diet for your birds. By plant products, I mean anything from a plant source, such as seeds, seed meals, greens, and vegetables. By animal products, I mean anything that comes from the animal kingdom, including, meat, fish, eggs, milk, insects and worms. Animal sources are nearly all good sources of complete protein – the only exception I have found is gelatin, which is an animal product, but because of its processing is not complete protein.
so now i wondering is a spectrum light necessary or do i need to investing in some insects food and cod liver oil
since i have no where to put the light right now i will work on improving the diet of my zebra finches and see what happens
what is your thoughts on this matter and the articles? what do you practice and how is it working ?