ROBERTSON 5P10023 698003 Bulk-Pak of 10 Ignitors for 35-150W High Pressure Sodium Lamp Equivalent to Philips-Advance LI551-H4-IC, LI551-J4-IC, LI501-H4-IC, Osram HPS150-3A Equivalent to Universal 47843 Keystone IGN-XG-01, GE 86635001I, Fulham HH-HPS-IG70-150 Also available as a Quik-Pak of 10 units individually packaged as 2P10023 Also available as a single quantity as 3P10023 Go to RobertsonDirect.com for complete technical data.