[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-565780-105":3,"detail-sidebar-cat-1-en-105":81,"doc-detail-565780-en":127},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","how-to-determine-adequate-light-levels-how-to-guide","How to Determine Adequate Light Levels - How-To Guide","","Guidance for selecting adequate lighting levels under three decorative wall/ceiling conditions: dark, medium, and light. Calculations are based on average lumen output from common inside frosted incandescent bulbs (60, 75, and 100 watt) and adjust for smaller or larger wattages. It explains when fluorescent lighting allows cutting chart values by half, includes equivalent lumen output per square foot, and provides a three-step method using room square footage. A room-by-room watt-per-square-foot chart supports selection, noting dimmer-switch rooms and rounding guidance.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/template/","Template",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/template/general/","General",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/template/how-to-determine-adequate-light-levels-how-to-guide/565780/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/how-to-determine-adequate-light-levels-how-to-guide/565780.png","ImageObject",442,249,{"name":42,"@type":43},"404brain","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-27","2026-10-13",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",9,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What does the lighting chart assume when determining adequate light levels?","Question",{"text":63,"@type":64},"The chart is based on average lumen output of 60, 75, and 100 watt inside frosted incandescent bulbs for three hypothetical decorative situations: dark, medium, and light colored walls and ceilings.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How do I calculate the desirable incandescent light amount for my room?",{"text":68,"@type":64},"Compute room square footage by multiplying length by width, then multiply by the chart’s watts-per-square-foot value for the room type and decorative scheme. The result is the desirable incandescent total and can be rounded up or down to match standard bulb wattages.",{"name":70,"@type":61,"acceptedAnswer":71},"How does using fluorescent lighting affect the chart values?",{"text":72,"@type":64},"When fluorescent lighting replaces incandescent, the amounts shown in the chart can be reduced by one-half because fluorescents produce well over twice as many lumens per watt. Equivalent lumen output per square foot is included for other calculation sources.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},565780,1792086779,{"code":4,"msg":82,"data":83},"success",[84,89,94,99,104,109,114,119,124],{"id":85,"doc_module":22,"doc_module_name":25,"category_name":86,"show_sort_weight":87,"slug":88},11,"Presentations",90,"presentations",{"id":90,"doc_module":22,"doc_module_name":25,"category_name":91,"show_sort_weight":92,"slug":93},12,"Resumes",80,"resumes",{"id":95,"doc_module":22,"doc_module_name":25,"category_name":96,"show_sort_weight":97,"slug":98},14,"Invoices",70,"invoices",{"id":100,"doc_module":22,"doc_module_name":25,"category_name":101,"show_sort_weight":102,"slug":103},15,"Posters",60,"posters",{"id":105,"doc_module":22,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},16,"Social Media",50,"social-media",{"id":110,"doc_module":22,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},17,"Forms",40,"forms",{"id":115,"doc_module":22,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},18,"Letters",30,"letters",{"id":120,"doc_module":22,"doc_module_name":25,"category_name":121,"show_sort_weight":122,"slug":123},21,"Paper Templates",5,"papers-templates",{"id":125,"doc_module":22,"doc_module_name":25,"category_name":29,"show_sort_weight":4,"slug":126},158,"general-158",{"code":4,"msg":82,"data":128},{"doc_id":79,"user_id":129,"nickname":42,"user_avatar":130,"doc_module":22,"category_id":125,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":22,"language":136,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":12,"update_tm":140,"read_time":4},1099529839291,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","ANOTHER  \n G & G ELECTRINFORMATIONICSAHNDEET PLUMBING DISTRIBUTORS, INC.  23 COPYRIGHT 1989  \nHOW TO DETERMINE ADEQUATE LIGHT LEVELS  \nThis chart was developed as our recommendatio n for adeq uate lighting levels u nder three hypothetical decorative situations: dark, medium and light colored walls and ceilings .  \nIt is based on the average lumen output of 60, 75 and 100 watt inside frosted incandescent light bulbs since these sizes are most commonly used in fixtures for general lighting . When smaller wattage bulbs are used, the wattage requirements should be considered somewhat higher than those shown in the chart and, likewise, if larger bulbs are used, the need can be considered somewhat lower . This is to compensate for the fact that lower wattage bulbs produce fewer lu mens per watt than those of higher wattage .  \nWe are aware that ind ivid ual lig ht level p references vary considerably . However, once the fixtures are installed, it is much easier and less costly to reduce lighting levels than to increase them.  \nNote that when fluorescent lig hting is used in place of incan desce nt, t he amounts shown in the chart can be reduced by one-half since fluorescents produce well over twice as many lu mens per watt than incandescent bulbs. We have included equivalent lumen output per square foot to aid in light level calculations using sources other than standard incandescent.  \nTO USE THE CHART  \n1. Find the square footage of your room by multiplying its length by its width.  \n2. Multiply this total by the watts per square foot figure shown in the chart that corresponds with t he ty p e of room yo u a re fig u r i ng a n d its decorative scheme.  \n3. The answer you get is the desirable amount of incandescent light you need . This total can be rounded up or down so as tobe applicable using standard wattage bulbs.  \n\n| TYPE OF ROOM | LIGHT COLORED DECOR | MEDIUM COLORED DECOR | DARK COLORED DECOR |\n| --- | --- | --- | --- |\n| *Kitchen Bathroom Den\u003Cbr>Study\u003Cbr>Workshop | 4 Watts (56 Lu mens) per sq . ft. | 5 Watts (70 Lu mens) per sq . ft. | 6 Watts (84 Lu mens) per sq . ft. |\n| *Bedroom\u003Cbr>*Living Room Den\u003Cbr>*Family Room Utility | 3 Watts (42 Lu mens) per sq . ft. | 4 Watts (56 Lu mens) per sq . ft. | 5 Watts (70 Lu mens) per sq . ft. |\n| *Dining Room\u003Cbr>*Entertainment Area Storage Room Hallways | 2 Watts (28 Lu mens) per sq . ft. | 2-1/2 Watts (35 Lu mens) per sq . ft. | 3 Watts (42 Lu mens) per sq . ft. |\n\n* Indicates a room where use of a dimmer switch is suggested.  \nThese “How-To-Do-It”sheets have been reviewed in June 2007 by a professional Engineer. If you find a problem, please notify G & G Electric & Plumbing at 1900 NE 78th Street, Ste. 101, Vancouver, Washington 98665","cbCaiiO6PEOdnHcl","https://ap.wps.com/l/cbCaiiO6PEOdnHcl","pdf",40353,"English","# How to Determine Adequate Light Levels\n## Chart basis and adjustment rules\n## How to use the chart\n## Room lighting values by decor type","[{\"question\":\"What does the lighting chart assume when determining adequate light levels?\",\"answer\":\"The chart is based on average lumen output of 60, 75, and 100 watt inside frosted incandescent bulbs for three hypothetical decorative situations: dark, medium, and light colored walls and ceilings.\"},{\"question\":\"How do I calculate the desirable incandescent light amount for my room?\",\"answer\":\"Compute room square footage by multiplying length by width, then multiply by the chart’s watts-per-square-foot value for the room type and decorative scheme. The result is the desirable incandescent total and can be rounded up or down to match standard bulb wattages.\"},{\"question\":\"How does using fluorescent lighting affect the chart values?\",\"answer\":\"When fluorescent lighting replaces incandescent, the amounts shown in the chart can be reduced by one-half because fluorescents produce well over twice as many lumens per watt. Equivalent lumen output per square foot is included for other calculation sources.\"}]","How to Determine Adequate Light Levels - How-To Guide | PDF",1791857997]