All of our LED MR-16 Halogen Equivalent Lamps feature our patented Easy Identification System. Lamp colors indicate the wattage of the LED, and the beam angle is engraved on the face of every optic for easy to see, accurate replacement you can identify without even having to remove the lamp from the fixture! Saving you time and effort! Can be used with any CAST fixture with a MR-16 Socket, such as CBL1CBUSA, SBL10, SBL21