various lighthouses; first day cover & postmark: singapore, 1982

the lighthouses.

• Sultan Shoal Lighthouse [bottom right]
• Horsburgh Lighthouse [bottom left, on cover] 
• Raffles Lighthouse [top] 

what. first day cover of stamps with lighthouse and postmarks with lighthouse

where.

• Sultan Shoal Lighthouse: Sultan Shoal, Singapore 
• Horsburgh Lighthouse: Pedra Branca, Singapore 
• Raffles Lighthouse: Pulau Satumu, Singapore 

remarks. Besides the 3 stamps and postmarks with lighthouses, the cover itself also features a lighthouse.

note. Malay for lighthouse: rumah api; Mandarin Chinese for lighthouse: 灯塔 (simplified script; dēngtǎ), 燈塔 (traditional script; dēngtǎ); Tamil for lighthouse: கலங்கரை விளக்கம் (kalaṅkarai viḷakkam)