Dennis, there is no accurate way to convert power (V*I) to lumens. Basically the temperature of the filament will drive the lumens value.
Leslie. -------------------------------------------- On Mon, 9/4/17, Dennis C. via CnC-List <cnc-list@cnc-list.com> wrote: Subject: Stus-List LED bulb lumen equivalents To: "CnClist" <CnC-List@cnc-list.com> Cc: "Dennis C." <capt...@gmail.com> Date: Monday, September 4, 2017, 9:19 AM I replaced the bulb in Touche's binnacle compass this weekend. Really wanted to look at an LED bulb but got hung up on the brightness. I just replaced it in kind from an auto parts store. The original bulb was a trade number 1891, 3.4W, 12 VDC mini-bayonet (BA9S) base. It's not difficult to find the correct base and height but determining the brightness is confusing. I don't need a compass light that can be seen by the International Space Station. The new specification for LED bulbs is in lumens. I did some quick research on the Web but couldn't find a reliable conversion for watts 12 VDC to lumens. Found some sites for 120 VAC but not 12 VDC. So, how many lumens is a 3.4 watt 12 VDC bulb? Has anybody found a decent website for converting watts 12 VDC to lumens? Dennis C.Touche' 35-1 #83Mandeville, LA_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! -----Inline Attachment Follows----- _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
