Pen Light, Zitrades Nurse Led Medical Penlight with Pupil Gauge for Nursing Students Doctors with AAA Batteries (Red/Silver-10) Type:BA15D to E12A,Material: Metal, Plastic Handmake fully Voltage: Suit for All Voltage,CE Rohs Listed High temperature resistance around 200 degree Attention: Halogen bulbs is not available using on this Socket.Only for LED bulb. You can choose more LED Lights to adapt to your fixture or base