{"id":2032,"date":"2017-06-13T19:38:33","date_gmt":"2017-06-13T17:38:33","guid":{"rendered":"http:\/\/www.sciencetronics.com\/greenphotons\/?p=2032"},"modified":"2025-06-16T18:37:50","modified_gmt":"2025-06-16T16:37:50","slug":"top-deal-of-the-week","status":"publish","type":"post","link":"https:\/\/www.sciencetronics.com\/greenphotons\/?p=2032","title":{"rendered":"Top deal of the week?"},"content":{"rendered":"

Today I received a newsletter from the publisher Elektor. I am offered a special deal on a Peltier power generator which can power an LED light from a small candle. And this for an astonishing price of \u20ac99.95 instead of the normal price of \u20ac119.95.<\/p>\n

\"Great<\/a>
Great offer from Elektor.<\/figcaption><\/figure>\n

I’ll have to buy this – or wait a second…<\/p>\n

I know the IKEA LED light Jansj\u00f6<\/a> from the add quite well, so I thought until I noticed that this was an USB rip-off from the same series: <\/p>\n

IKEA Jansj\u00f6 spot light: 3 W power, 88 lumen
\nIKEA Jansj\u00f6 USB: unknown power(ca 0.5 W?), 10 lumen<\/p>\n

We can supply an LED light with probably 0.5 W and 10 lm from the heat of a candle, isn’t it great?<\/p>\n

If we stay at IKEA we can buy these candles, 24 with a burning time of 4 hours for \u20ac0,99. These together could light our LED light for a full 4×24 hours = 96 hours. Thus we get a total of 96 h x 0.5 W = 48 Wh or 0.048 kWh for \u20ac0,99. This corresponds to \u20ac20 per kWh, about 100x more expansive than electricity from the wall outlet (in Germany) – ignoring the downpayment on the gadget itself.
\n<\/p>\n","protected":false},"excerpt":{"rendered":"

Today I received a newsletter from the publisher Elektor. I am offered a special deal on a Peltier power generator which can power an LED light from a small candle. And this for an astonishing price of \u20ac99.95 instead of the normal price of \u20ac119.95. I’ll have to buy this – or wait a second… […]<\/p>\n","protected":false},"author":1,"featured_media":2033,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[11,40,28,27],"tags":[],"class_list":["post-2032","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electronics_en","category-leds","category-politics_en","category-science_en","entry","has-media"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.sciencetronics.com\/greenphotons\/wp-content\/uploads\/2017\/06\/peltierlampe_02.jpg","jetpack_shortlink":"https:\/\/wp.me\/p48grL-wM","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/posts\/2032","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2032"}],"version-history":[{"count":4,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/posts\/2032\/revisions"}],"predecessor-version":[{"id":2336,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/posts\/2032\/revisions\/2336"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=\/wp\/v2\/media\/2033"}],"wp:attachment":[{"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sciencetronics.com\/greenphotons\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}