Can you elaborate on the glare/eyestrain ? What sort of luminaire design, what lighting level, and what actually causes the eyestrain : direct glare from lenses, too "flat" light distribution, excessive blue, too "flat" colors in general ?
The use of separate TIR lenses for each LED resulting in the light from the fixture coming from a number of very small points. These cause eyestrain which gives the observer the illusion of brightness due to their eyestrain when in reality the fixture is quite dim. Fixtures where the light from the lamp is diffused by a large lens do not have this problem.