Re: Dreaded Daylight Savings Time Adjustment Just caught up with this thread. For those who are interested in learning more about stepped, or "incremental" lighting, this article that I wrote in 1999 (and appeared in the NCS Journal) is available at the Birds & Lighting Website. "SIMULATING NATURAL PHOTOPERIOD: THE STEPPED LIGHTING APPROACH."
Unless there is limited or no infiltration of outside light into a bird area, the idea of multiple light installations may be a bit of overkill. The need for this will be determined by the amount of light that is present in a room during normal sunrise and sunset, and the position of the cage in relation to the light.
For areas that do receive adequate early morning light, it is a relatively simple matter to delay the main lighting till a little after sunrise and just before twilight. This was one of the considerations of the timer technology of the SpectraBird fixtures, which calculates local sunrise/sunset times as an astronomic event and operates the timer accordingly.
Typical electronic ballast fluorescent lamps cannot be used with dimmer circuits--don't try as it will damage both the dimmer control and the ballast. There are special ballasts that can be dimmed--but they are meant to work with conventional tubes--low mercury full spectrum lamps do not function well with them.
If poor natural lighting conditions in a room dictate using a separate fixture to supply stepped light, a 15-25 watt incandescent lamp in a bowl reflector is recommended. Placement should be a distance away from the cage, and directed toward a wall--AND NOT DIRECTLY AT THE CAGE.
This allows two things to happen. The first is that the incandescent lamp provides light that is rich in reds--matching more closely the spectral content of early morning light. Second, reflecting it off the wall scatters the light--giving it a softer, more diffuse effect that accurately mimics the polarization of the light as it would occur naturally. |