Fluorescent tube lights have improved reflectors and light directors or dimming devices characterized by elongated light element protection tubes sleeved over the light elements and having a reflective and/or variable opacity surface formed thereon whereby the direction and intensity of light may be...http://www.google.fr/patents/US5510965?utm_source=gb-gplus-shareBrevet US5510965 - Adjustable reflector/director for fluorescent light fixture
Adjustable reflector/director for fluorescent light fixture
