ธาตุนีอ็อน, สี, ส่องแสง, สีนีออน, ความสว่างไสว, แสงวาว, ลูเมน, เรืองแสง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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