I was discussing using an incandescent lamp for a heater, where the amount of light is not important.\u00a0 I looked up some info on miniature lamps in the General Electric Miniature Lamp Catalog.\u00a0 Miniature lamps used to be inside of appliances, and cars, such as in the instrument panel, speedometer, glove box, etc.\u00a0 Now they have often been replaced by LEDs.<\/p>\n
Did you know that the life of a miniature lamp varies inversely as the 12th power of the voltage?\u00a0 And the candlepower varies as the 3.6th power of the voltage.\u00a0 That info is from the first page, which also has a graph of these values for different voltage percentages.<\/p>\n
I calculated that if I power the lamp with half voltage, the life will be 4096 times its rated life.\u00a0 So if its rated life is 1000 hours, then at half voltage it should last 4,096,000 hours.\u00a0 Gee, that’s 467 years!\u00a0 That beats LEDs by far!<\/p>\n
My co-worker retired years ago, but she and her husband lived on the street on which I travel on the way home from work.\u00a0 During these winter months when it’s dark on the way home, I pass by their house and I see the street address number dimly lit from behind by an incandescent lamp.\u00a0 The light is probably a 28V or more lamp running from a 16V doorbell transformer.\u00a0 All these years, probably since the house was built, the same light bulb has been lighting that street number, the amber or orangish glow on 24\/7.<\/p>\n
This just shows how long an incandescent light will last if you’re willing to sacrifice much of the light output.<\/p>\n","protected":false},"excerpt":{"rendered":"
I was discussing using an incandescent lamp for a heater, where the amount of light is not important.\u00a0 I looked up some info on miniature lamps in the General Electric Miniature Lamp Catalog.\u00a0 Miniature lamps used to be inside of appliances, and cars, such as in the instrument panel, speedometer, glove box, etc.\u00a0 Now they <\/p>\n (Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,13],"tags":[],"class_list":["post-5681","post","type-post","status-publish","format-standard","hentry","category-flashlight","category-lighting"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/5681","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5681"}],"version-history":[{"count":8,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/5681\/revisions"}],"predecessor-version":[{"id":5994,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/5681\/revisions\/5994"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}