หลอดไฟฟ้า, พลังงาน, ปัจจุบัน, นวัตกรรม, โคมไฟ, แสง, หลอดไฟ, สิ่งแวดล้อม, การทดลอง, ส่องแสง, เรืองแสง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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