About 'led replacement lamps'|Cree shows off 'no-compromise' LED replacement for 60-watt incandescent bulbs
Ｉｎ ｔｈｅ ｍｉｄ '90ｓ ｔｈｅｙ ｔｏｏｋ ａ ｑｕａｎｔｕｍ ｌｅａｐ ｔｏ ｒｅｐｌａｃｉｎｇ ｏｕｒ (ａｐｐｒｏｘｉｍａｔｅｌｙ) 100 Ｗａｔｔ ｉｎｃａｎｄｅｓｃｅｎｔ ｌａｍｐｓ ｉｎ ｏｕｒ ｔｒａｆｆｉｃ ｃｏｎｔｒｏｌ ｕｎｉｔｓ ａｔ ｍｏｓｔ ｏｆ...