What are lumens ? What are Lux ?

what are Lumens and why are they the most commonly used unit of measurement for lighting product?
 there's only a lot of different ways to measure visible light out there depending on the product and the application and contrary to popular lumen opinion exactly the best measurement for the Emergency warning Market before we get a better understanding of

                     


 what part of the electromagnetic spectrum?
 the Spectrum begins with super long radio waves measuring the size of Mount Everest to super tiny gamma rays still larger than Atomic nuclei the section between infrared and ultraviolet light is known to us as visible light wavelength for higher power now that we understand what we can and can't see

 let's learn a little more about a human eye sensitivity believe it or not the human eye doesn't react the same to all colors on the Spectrum when looking at the visible light spectrum you will notice that are high is the most sensitive at about 559nm of which we see is green lights blue and red are the least sensitive to us because they both ends of the spectrum that's where  lumen come in

when applying 1 W a power to a blue and green LED you'll notice that the greens is much brighter than the blu even though they're the consume same amount of power to life and reduce the total measurement and limits the light.

 source is used to measure the amount of light on a Define service Candelas on the other hand calculate the total amount of describe the performance of a lighting Products relative application but there are some big differences if you're selling bulbs designed to light up a full room you would represent the Lumen rating since showcasing the total amount of light exiting the bowl if you're selling stage lighting lighting is well defined by the sides of the stage when an emergency vehicle is in route to a scene light bars only focus is shining concentrated amount of Life at certain points to get a driver's attention because it's so critical the lights the driver's eyes foot need to measure in Candelas to accurately calculate the amount of light at that given point so now we know the difference is seems a little odd that marketing advertisements for emergency light bars still show the Lumen rating for the majority of them show just the wrong numbers which don't take into account other factors that can actually decreased the light output those factors include the clarity of the lens efficiency the Optics the power regulator in a thermal performance of the heat sink with all of his limiters are factored in affected by the total number of LEDs in the product here at Phoenix we decided to run a little test we ordered two different flashlights from two different manufacturers flashlight one advertising output of 600 raw Lumen flashlights to advertise 500 after testing the total woman outfits on the flashlight one produce a total of 300 a factor of lumen flashlights to produce 450 so your choice flashlight to and actually brighter G regulate Jet Li performance strictly looking at the red Cobra 6 LED module for example you will notice that the power of 1645 Candelas which is 5 * requirement of sat class 1 666 Candelas at 20 degrees off-axis which is 22 times the same class 1 requirement as you can see there isn't a lumen rating of sight because it's not about the way towards the sky or the ground again it's about the light intensity at a given point and effort to warn drivers considerable distances away now you might be wondering how many candles do you have to produce to grab someone's attention way down the road and at what distance can the human eye see visible Life Believe It or Not Your Eyes are capable of seeing one Candela 1645 Candelas of a red Cobra T6 potentially be seen for a hundred miles

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