關於頭燈亮度與時間 - 戶外用品

By Edward Lewis
at 2015-04-12T14:29
at 2015-04-12T14:29
Table of Contents
最近在挑頭燈
要求是不用太亮
但希望能長時間維持一定的亮度
不過在看商品介紹時
卻產生了一些疑問
http://tinyurl.com/lyuuppa
以黑鑽石本產品的介紹為例
問題一
一樣在亮度會持續降低的情況下
開160流明可以維持70小時才沒電
為何只開18流明卻只能維持17小時呢?
問題二
以持續開燈十小時來說
亮度全開的可照距離雖然會從70變成9米
開小燈應該比較省電
但為何無法保持在10米範圍
而是一樣會縮減距離呢
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