1, the lamp axis
Through the axis of the geometric center of the light source.
2. Initial photoelectric parameters
Refers to the optical and electrical values ​​measured at the end of the ageing of the bulb, mainly color temperature, luminous flux and power.
3, the height of the light center
Refers to the distance between the effective geometric centerline of the filament and the contact at the bottom of the lamp cap.
4, cylindrical tungsten halogen bulb
A cylindrical halogen bulb that is single-ended.
5, cold reflection directional lighting halogen tungsten bulb
The tungsten halogen lamp combined with the multi-plane dielectric film mirror is called a cold reflection directional illumination tungsten halogen lamp, and the lens is called a closed cold reflection directional illumination tungsten halogen lamp.
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