เบา, กระเปาะ, แสง, ร้อนระอุ, หลอดไฟฟ้า, เปิดไฟ, ไฟฟ้า, พลังงานแสง, พลังงาน, โคมไฟ, อำนาจ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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