Hi, I am working on a devise that along with the bulb in question would snap the bulb and trigger the emergency stop circuit through a micro switch before crashing the carriage into the chuck. Without the bulb as part of the stop circuit setting a micro switch to trigger the stop would remove the solid stop design. At present I am using it as it is. I may abandon the idea and cut the bulb off since it works well as is, and I still would have the shear pin as a safety. Thanks and hope this helps explain the intended use of the bulb. Charlie