IR flashlight

[Roni Segoly]

I got some IR flashlights including this one

http://www.ebay.com/itm/371599246642

It work well and I can see IR via mobile camera and Raspberry camera

But I was wondering why is there also visible light emitted, although very weak. Is it part of IR spectrum?  

[Chris Fastie]

If you can see light from the lamp, it is not infrared. The LEDs they use must emit some visible light.

Chris

[Roni Segoly]

my question was whether the led they use to emit infra also emit some visible as default, or whether they add visible so there will be indication that it is working, for example in camera flash lights 

On Wed, Aug 24, 2016 at 5:31 AM Chris Fastie <cfa...@gmail.com> wrote:

If you can see light from the lamp, it is not infrared. The LEDs they use must emit some visible light.

Chris

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