Works with lamps that are energy efficient Straight sides of metal baffle for large diameter lamps/self-flanged specular reflector cone, white trim Adjustable in use with various lamp types Coil spring retention hold trims in place/slightly oversized ring expands BR40, PAR38, BR30 ...Works with lamps that are energy efficient Straight sides of metal baffle for large diameter lamps/self-flanged specular reflector cone, white trim Adjustable in use with various lamp types Coil spring retention hold trims in place/slightly oversized ring expands BR40, PAR38, BR30 and PAR30 lamps/compatible with E26 screw base lamps in halogen, incandescent, LED and CFL Straight reflector trim with self-flange in the 6 inch trim family for use in recessed down lighting. Self-flanged trim ring sized to hide gaps caused by construction tolerances. Compatible for use in Halo and other housings.