A colour filter, plastic or gel, shaped so as to fit over tungsten. tungsten-halogen, or low energy fluorescent lamps, changing the spectral emission so as to simulate the effect of having installed low energy multi-LED lamps, but without the trouble and expense.

Produces a dim, shadowy light that doesn't render colours properly, makes it difficult to read, and eventually causes blinding headaches.

Be the envy of your friends and neighbors ....
-- 8th of 7, Nov 03 2009

don't complain too much. It was a near thing that filament lighting won out over florescent.
-- WcW, Nov 03 2009


Properly designed LED lights produce bright, full spectral light. Stop buying the cheap ones.
-- MechE, Nov 03 2009


I heard that about HID too, how a good HID system wouldn't blind other drivers and would provide bright glare free light. Easy to say.
-- WcW, Nov 03 2009



random, halfbakery