{"id":19958,"date":"2024-10-17T07:04:28","date_gmt":"2024-10-17T07:04:28","guid":{"rendered":"https:\/\/www.1abc.co.uk\/blog\/low-energy-bulbs-main-types-compared"},"modified":"2024-08-22T11:20:13","modified_gmt":"2024-08-22T11:20:13","slug":"low-energy-bulbs-main-types-compared","status":"publish","type":"post","link":"https:\/\/palaeobiology.org.uk\/index.php\/2024\/10\/17\/low-energy-bulbs-main-types-compared\/","title":{"rendered":"Low-energy bulbs: main types compared"},"content":{"rendered":"<p><strong>Here we summarize the key features of the main types of low-energy light bulbs now available for domestic situations.<\/strong><\/p>\n<h5><strong>Spiral 21 watt CFL with integral LED nightlight<\/strong><\/h5>\n<h3>CFLs (Compact Fluorescent Lamps)<\/h3>\n<p>These work on same principle as fluorescent strip lighting, and contain an integral electronic ballast, which regulates current flow through the fluorescent tube.<\/p>\n<ul>\n<li><strong>Power:<\/strong> most in the range 8 to 24 watts; some delay in reaching full brightness<\/li>\n<li><strong>Light quality: <\/strong>earlier designs criticized for &#8216;cold&#8217; light; warmer toned designs now available<\/li>\n<li><strong>Styles: <\/strong>various, including sticks, spirals, traditional bulbs, globes, candles and reflectors<\/li>\n<li><strong>Dimmable:<\/strong> Yes, but certain designs only<\/li>\n<li><strong>Lifetime: <\/strong>varies, usually in range 6000 to over 20,000 hours<\/li>\n<li><strong>Environmental: <\/strong>contain small amounts of mercury vapour inside the tube &#8211; no more than 5 milligrams, and in some designs less than 1 mg. Broken or obsolete bulbs should be disposed of appropriately (see <a href=\"https:\/\/www.thelightbulb.co.uk\/resources\/disposing_of_light_bulbs_batteries\/?srsltid=AfmBOooBnfsXie6R7UPUQ68_swpuVOElqa6WK1_UCOzg0salD0OYYoNO\" target=\"_blank\" rel=\"noopener\">Disposal of low-energy light bulbs<\/a>).<br \/>\n<h5>A 20 watt CFL with remote-controlled built-in dimming mechanism that works in a standard light fitting<\/h5>\n<\/li>\n<\/ul>\n<h3>Halogen bulbs<\/h3>\n<p>Consist of a tungsten filament surrounded by inert gas plus traces of a halogen such as iodine or bromine. Standard halogen bulbs are only slightly more efficient than the old tungsten filament bulbs, whereas the energy-efficient versions use about 30% less energy than standard halogen bulbs. Halogen bulbs are commonly used for spotlights and downlighters; but why not try the much more efficient LED equivalents?<\/p>\n<ul>\n<li><strong>Power:<\/strong> 40 to 150 watts (less than 30 watts for some &#8216;eco&#8217; energy-saving designs); full brightness achieved at switch-on<\/li>\n<li><strong>Light quality: <\/strong>bright or &#8216;cool&#8217; tone<\/li>\n<li><strong>Styles:<\/strong> various, including traditional bulb, candle, globe, reflector<\/li>\n<li><strong>Dimmable: <\/strong>yes<\/li>\n<li><strong>Lifetime: <\/strong>typically 2000 hours<\/li>\n<li><strong>Environmental: <\/strong>contain no mercury or lead<\/li>\n<\/ul>\n<p><strong>NOTE:<\/strong> handle without touching the glass envelope to avoid damaging the bulb, unless enclosed in a second glass globe (as pictured here).<\/p>\n<p><strong>GE&#8217;s HaloSpherical halogen bulb <\/strong><\/p>\n<h3><strong>Light-Emitting Diode (LED) bulbs<\/strong><\/h3>\n<h5>&#8216;Warm white&#8217; 6 watt bulb containing three LEDs, for use in downlighters<\/h5>\n<p>A profusion of new designs and fittings mean that LEDs can now be used in virtually every application in the home, office or factory. They are produced in a huge variety of forms, from flexible self-adhesive strips to flat panel units for ceilings. There are even LED floodlights with a claimed life of 50,000 hours that will replace 150 W halogen units. Note that both low-voltage DC and 240 volt AC versions are available, so make sure you have the correct type for your fitting.<\/p>\n<ul>\n<li><strong>Power: <\/strong>current domestic versions typically range from 1 to 8 watts<\/li>\n<li><strong>Light quality: <\/strong>earlier designs gave a &#8216;cool&#8217; white light, but &#8216;warm&#8217; tones increasingly available; also, various single colours, and sequential multicoloured giving a mini light show, with remote control!<\/li>\n<li><strong>Styles: <\/strong>reflectors most common, but new designs include LED clear or frosted globes and candles, and LED cove lighting to replace fluorescent units<\/li>\n<li><strong>Dimmable:<\/strong> only certain designs; otherwise, dimmers greatly reduce the lifetime of the bulb<\/li>\n<li><strong>Lifetime: <\/strong>typically from 15,000 to over 25,000 hours, although some decorative styles may have a shorter lifetime<\/li>\n<li><strong>Environmental:<\/strong> contain no mercury, although LED semiconductors may contain small amounts of lead, nickel, arsenic and other potentially toxic metals.<\/li>\n<\/ul>\n<h5 align=\"right\">Viribright 8W dimmable &#8216;warm white&#8217; LED bulb.<br \/>\nThe aluminium casing gives direction to the 500 lumen light output.<\/h5>\n","protected":false},"excerpt":{"rendered":"<p>Here we summarize the key features of the main types of low-energy light bulbs now&hellip;<\/p>\n","protected":false},"author":3,"featured_media":20073,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,2],"tags":[],"class_list":["post-19958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-construction","category-green-energy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Low-energy bulbs: main types compared - Palae Energy PLC<\/title>\n<meta name=\"description\" content=\"Here we summarize the key features of the main types of low-energy light bulbs now available for domestic situations. 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