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1. Increasing "lumens" of "brightness" does NOT mean there is more light.

Learn what the term "brightness" and "lumens" really means. Learn how so many people misunderstanding these terms has lead to so much poor quality LED illumination.


What parameters are important for good illumination in various situations?


2.  Many meat, fish, bakery, and retail shops have recently been changing to better light spectra LED lamps after originally being mislead into installing poor-spectra "super-bright"  LED lighting.

But, for quickly identifying details and seeing better when dark-adapted when out in the wilds, you want more than just a retail-optimized warm light.

3. TV or phone screens are poor "illuminators". They also only output half the visible spectrum even though they can "display" many colors.


(Example: There is almost no yellow light from these screens. Red and green light are mixed to make the eye perceive various yellows for on-screen images, but true-yellow reflecting objects would appear almost gray in this light.)


6. Your perception of color hues, tints, tones, angles, depth,  translucence, wet, iced, waxy, or oily surfaces, patterns, and other visual effects can be determined by many parts of the light spectrum and light angles you often "unconsciously" use in full-spectrum daylight?


7. Multiple angles of light are almost always present in "daylight".


Direct "sunlight" is only a part of "daylight". Wide-angle "Skylight" and light reflected from other surfaces at many angles play a big role in why visual detail in "daylight" appears better.

FYI: Most daylight from other angles is also full-spectrum, but with different spectra. e.g., Skylight has more violet-blue relative to red.


8. Adding more poor spectral quality light typical of most LED headlamps or flashlights can actually REDUCE your color, detail, and peripheral vision of nearby surroundings, even when low-level higher quality light is present, such as at mid-twilight.


Typical white LED light oversaturates yellows and yellow-green, making many other colors in surfaces more difficult to see.

9.  Your pupils often glance unconsciously at your feet and foot-forward zone when walking.  Headlamps alone require constant head tilting, since using pupil movement alone requires a constantly lighted foot-forward zone.

(Try walking outdoors with this view blocked)


10. Too wide of vertical angle light on the head will night-blind you.  

11. Your dark-adapted vision is a powerful tool, if used correctly.


And, your eye's dark-adapted rods are most sensitive to cyan light. Cyan is weak in other LED headlamps and flashlights.


Use less power, see-better, & be less obtrusive with quality light.

12. "Rain Resistant" (e.g., IP44 or IPX4) only means able to survive light sprinkles for 15 minutes.

In heavy rain, IPX7 (or IP67) can be important.

Learn what these codes for dust and water resistance mean.

Even if you rarely trek outdoors at night in the rain, you care!

This is just a portion of what is worth knowing when you 

select illumination to help you see better outdoors

Go to our "Vision Science"  section of this website to learn more about light and vision

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