Does your camera footage have a slight purple tint to it? There are a couple of things you can try if this is an issue:
1. Try using one of our Daylight LED lamp - it only runs during the day so it won't disturb the birds when they settle down for the night. You'll need to run a separate power supply for the lamp.
2. Try to add more natural light to your bird box by using a perspex window or something similar.
3. Try covering some of the LEDs using tissue paper or similar to diffuse the light.