Assertion: lamp | /r/HasProperty | mounted near grounded earthedreflector
Facets:
value: to allow
type: PURPOSE
Source sentences:
text: Usually operating at a lower arc voltage than the instant start design; no inductive voltage spike is produced for starting, so the lamps must be mounted near a grounded (earthed) reflector to allow the glow discharge to propagate through the tube and initiate the arc discharge[why?]. In some lamps a grounded "starting aid" strip is attached to the outside of the lamp glass.