หลอดไฟฟ้า, เบา, พลังงาน, ความคิด, ไฟฟ้า, เทคโนโลยี, ความคิดสร้างสรรค์, ห้อง, แรงบันดาลใจ, เรืองแสง, แสง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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