150W Elliptical High Pressure Sodium HPS with ignitor. Brand references to these are Osram NAV E, GE Lucalox E, Philips Master SON E and Sylvania SHP E. When selecting SON E lamps please take care to check if you need Internal ignitor or external ignitor, these are differentiated by a trianlge with an E inside (external ignitor) and an I inside (internal ignitor).
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