ＬＥＤ電球へ交換③－リビング・シャンデリア（仮） ― 2011/04/16 18:01
これは、まだ試験的な状態です。（よって、タイトルに（仮）と付けておきました。）
リビングの照明器具は、電球を６つ使ったシャンデリア・タイプです。ランプの傘は、花をイメージしたような形が６つ、恐らく６０度の角度で６方向の斜め下を照らすようになっています。
試験的な状態ということもあり、既に何段階か変化があります。
①購入当初（数年前）
電球色の電球型蛍光灯が６つ付いていました。
消費電力は、１２Ｗ×６＝７２Ｗ といったところでしょうか。
リビングの照明器具は、電球を６つ使ったシャンデリア・タイプです。ランプの傘は、花をイメージしたような形が６つ、恐らく６０度の角度で６方向の斜め下を照らすようになっています。
試験的な状態ということもあり、既に何段階か変化があります。
①購入当初（数年前）
電球色の電球型蛍光灯が６つ付いていました。
消費電力は、１２Ｗ×６＝７２Ｗ といったところでしょうか。
②電球の交換（２～３年前）
電球型蛍光灯は、数年使うとだいぶ照度が落ちてくるようで、もう少し明るさが欲しいという要望から、電球を交換しました。
といっても、この当時、店頭に並んでいるＬＥＤ電球は、７千円くらいしたような記憶があります。（もしかすると、もっとしたかもしれません。）
まだ、ＬＥＤ電球が店頭に並んだばかりの頃で、いちおう気にしつつも、到底手が出せるものではなく、素直に昼白色の電球型蛍光灯に、全て交換しました。
同じタイプの電球型蛍光灯なので、消費電力は７２Ｗのまま変わりません。
新品になったということと、昼白色に変わったということで、だいぶ明るくなった印象がありました。
＜訂正＞
ちなみに、推定、全光束は、７８０ルーメン×６つ＝４，６８０ルーメンです。（誤り：７１０ルーメン×６つ＝４，２６０ルーメン）
③電球を外す（一ヶ月前）
震災の直後、電力不足が表面化し、首都圏の交通がマヒした頃のことです。
恐らく、誰しもが何かしらの節電策を講じたと思いますが、我が家でも、その一環として６つある電球の内、２つを取り外すことにしました。
＜訂正＞
よって、１２Ｗ×４＝４８Ｗ ということになりました。（３３％の削減ですね。推定、全光束は、７８０ルーメン×４つ ＝３，１２０ルーメンです。（誤り：７１０ルーメン×４つ ＝２，８４０ルーメン））
実は、随分まえから、私の頭の中には”普通の節電”という観点から電球を取り外す事を考えていたのです。しかし、家族の反対を押し切る事ができず、この時まで実現できないでいました・・・。
④ＬＥＤ電球を１つ、蛍光灯を２つに（半月前）
玄関、トイレに使用したのと同じメーカーのＬＥＤ電球を一つ、試しに買ったのでそれを付けて見ました。
『ORION LEC-Q600S』というもので、全光束４２０ルーメンの昼白色（６．６Ｗ）です。
６０Ｗの白熱球を、全光束に換算すると、８００ルーメンと言われています。それを考えると、とても明るさが足りるとは思えないのですが、そこは”試験”ということで、電球型蛍光灯から、このＬＥＤ電球へ交換します。
また、この際なので、もう一つ電球を外しました。
よって、電球型蛍光灯（１２Ｗ）が２つ、ＬＥＤ電球（６．６Ｗ）が１つの、計３つとなります。
１２Ｗ×２＋６．６Ｗ＝３０．６Ｗ となりました。
＜訂正＞
推定、全光束は、７８０ルーメン×２＋４２０ルーメン＝１，９８０ルーメンです。（誤り：７１０ルーメン×２＋４２０ルーメン＝１，８４０ルーメン）
ちなみに、家族は誰もこの変化に気づいていません。
⑤ＬＥＤ電球を２つ、蛍光灯を１つに（数日前）
数日前に、ＳＨＡＲＰ製の「ＤＬ－Ｌ６０１Ｎ」という、全光束５６０ｌｍ、定格消費電力７．５Ｗという、そこそこ明るいＬＥＤ電球を、なんと￥１，２８０で購入したという話を以前しました。それを、電球型蛍光灯一つと交換しました。
よって、電球型蛍光灯（１２Ｗ）が一つ、ＬＥＤ電球が２つ（６．６Ｗと、７．５Ｗ）の、計３つとなります。
１２Ｗ×１＋６．６Ｗ＋７．５Ｗ＝２６．１Ｗ となりました。
＜訂正＞
推定、全光束は、７８０ルーメン＋４２０ルーメン＋５６０ルーメン＝１，７６０ルーメンです。（誤り：７１０ルーメン＋４２０ルーメン＋５６０ルーメン＝１，６９０ルーメン）
ちなみに、ここでも、家族は誰もこの変化に気づいていません。
【現状、まとめ】
消費電力は、当初の７２Ｗから２６．１Ｗに、（推定）全光束は、４，６８０ルーメンから、１，７６０ルーメンに変化しました。（誤り：４，２６０ルーメンから、１，６９０ルーメン）
消費電力は約３６％に、全光束は約３８％になりました。（誤り：全光束は約４０％）
消費電力が１／３近くまで減少したのは良いのですが、明るさもそれに近いくらい減少しているので、なんとも複雑な心境です。
もう少し新しいＬＥＤ電球であれば、もう少し効率が良くなりそうですが、ＬＥＤ電球そのものの値段が高いので、しばらくは手を出せそうもありません・・・。
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