Puluhan abad yang lalu, dimana manusia membutuhkan penerangan untuk malam hari, mereka akan menggosok-gosokan batu sampai mengeluarkan api, kemudian api dikembangkan dengan membakar benda-benda yang mudah menyala hingga membuat sekumpulan cahaya dan seterusnya sampai ditemukannya bahan bakar minyak dan gasoline yang dapat digunakan untuk bahan penyalaan pada lampu obor, lampu minyak dan lampu gas.
Ada dua tipe lampu plafon di pasaran, yaitu halogen dan LED. Meski memiliki fungsi yang sama, tingkat konsumsi energi kedua tipe lampu ini berbeda.
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Energi listrik yang diperlukan oleh lampu pijar lebih besar dibandingkan dengan sumber cahaya buatan lainnya seperti lampu pendar dan dioda cahaya. Selain manfaat cahaya yang dihasilkan, beberapa penggunaan lampu ini lebih memanfaatkan panas yang dihasilkan, contohnya seperti pemanas untuk kandang ayam, dan pemanas inframerah dalam proses pemanasan dalam bidang industri.
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