Vital-Lamp Full Spectrum UVB Screw-in bulb
The Vital-Lamp bulb emits light that is very close to natural sunlight.
Sunlight and artificial sources of light are measured by color temperature and rendering. If you were to consider the intensity of the sun at noon, during daylight, it is about 5500 degrees Kelvin (K).
Natural light not only provides warmth, but brings out the intensity of colors in a way that artificial fluorescent lighting rarely mimics. The Vital-Lamp 20 watt spiral compact bulb emits the same color temperature as the sun at high noon. This replaces a 75 watt bulb.
Natural daylight is also measured at a color rendering index (CRI) of 100, which shows the vibrant and intensity of colors in and around our environment. To be a full spectrum bulb for birds, the color temperature must be 5000K or greater, and the CRI must be at least 88. Under this light you will bring out colors in your bird's feathers that you may not have even known existed while using a standard fluorescent cage light.
Full spectrum lighting has been proven to be beneficial to birds by mimicking their natural environment. One of the greatest benefits of full spectrum light for birds is the natural synthesis of Vitamin D precursors allowing the animal to naturally regulate calcium uptake. Other important benefits include improvement in pineal gland (controls the cyclical processes such as molting and the reproductive cycle), promotes normal preening by improving endocrine function (which controls things like timing of sleep), hormone production, body temperature, and other biological functions.