Overview Welch Allyn - WA00900 - 110/121 Replacement Light Bulb : Voltage 2.5 Welch Allyn - WA00900 - 110/121 Replacement Light Bulb Custom Field Product Reviews Write a Review Write a Review × Welch Allyn - WA00900 - 110/121 Replacement Light Bulb Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *