This is a set of two FG-1E glow starters for fluorescent lights. They are compatible with 10-30W fluorescent lamps. Compatible fluorescent lamps: ・FL10 / FL15 / FL20 / FL30 ・FCL20 / FCL30 ・Twin fluorescent lamps (13, 18, 27) I just bought these at the beginning of the year, but they were the wrong type for my lights, so I am selling them unused. No pets No smoking They will be shipped in simple packaging. Please understand that this is based on my amateur assessment. Please confirm and purchase only if you understand the above.