[Mini] high-beam LED 1400 millicandela at 1m only drawing 2.5A

[drew]

If it were a typical 55W halogen it would draw about 5A so you're 
drawing about half the current. Typical lumens on a 50W halogen is about 
400 to 500.  Problem is you can't measure lumens without some fairly 
specialised equipment.    Candela is intensity in one direction, to get 
lumens from that you need to measure the intensity at many points round 
the lamp, then integrate them to give a figure as if you had a 
measurement device that is a sphere round the lamp, this integration 
gives you the lumen figure.

Drew.



On 16/05/17 10:21, Dr John C Bullas wrote:
> Just used my light meter to measure the output of one of my LCD h4
> replacement modules
>
> get a luminous flux result of 17.6 lumens.... I'm confused
>
> https://www.compuphase.com/electronics/candela_lumen.htm
>
> it is very bright and COOL and drawing only only 2.5a
>
> Anyone care to tell me the light output or current load  if it were a
> quartz halogen bulb?
>
> Regards
>
> John
>
> Spec
>
>     - Newly Updated Model: High Power and super bright, high-efficency
>     radiating and higher universality;
>     - Input Voltage: DC 8V~36V
>     - Ultra Bright: 3000 Lumens,3 LED Chips lighted on for High beam, 2 LED
>     Chips lighted on for low beam;
>     - Integrated Design: Built-in Constant Current Dual-Driver, Instant full
>     brightness without start up delay!
>     - Option Colors: White (6500K)
>     - LED Type: COB
>     - LED QTY: 5th Generation 3 pcs COB LED chips
>     - Beam Angle: 360B0
>
>
>
>
> --
> --
>
> ===========================
> On Linked In: http://uk.linkedin.com/in/drjohnbullas
> On Academia.edu: https://soton.academia.edu/JohnBullas
> On Flickr: https://www.flickr.com/photos/johnbullas/
> Latest Project:
> https://www.flickr.com/photos/johnbullas/albums/72157665517840150
> _______________________________________________
> Mini-list at autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/mini-list/rileyelf@rileyelf.free-online.co.uk