Bulbrite brand Black-Backed MR16 halogen flood. 35 Watts for moderate power and light. 12 volts for low voltage systems. Low voltage means a smaller filament, for greater optical control.
Halogen lights provide brighter, whiter light than incandescents, while maintaining outstanding color rendering
Black backing prevents "back-spill" of light - light slipping between the fascets of the reflector and out the rear of the lamp
Flood means 38 beam spread and a wider beam of light. Lamp can be closer and still light the area effectively
Dichroic reflector reflects visible light out the front while letting heat escape out the back, resulting in a cool beam of light
Glass lens - enclosed fixture not necessary