# Night light for late BG work

**URL:** <https://forum.fudiabetes.org/t/night-light-for-late-bg-work/2062>\
**Category:** Gear\
**Created:** [September 19, 2017, 5:26am UTC](https://forum.fudiabetes.org/t/night-light-for-late-bg-work/2062 "2017-09-19T05:26:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Michel](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/michel/32/387_2.png) [@Michel](https://forum.fudiabetes.org/u/Michel)\
**Post date:** [September 19, 2017, 5:32am UTC](https://forum.fudiabetes.org/t/night-light-for-late-bg-work/2062/2 "2017-09-19T05:32:53Z")

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> [@How to calibrate a Dexcom G4/G5 CGM](https://forum.fudiabetes.org/t/how-to-calibrate-a-dexcom-g4-g5-cgm/2049/8):
>
> I’m sure this is something that you’ve considered, but have you thought of a headlamp with a red light?

The headlamp is a great idea!

> [@How to calibrate a Dexcom G4/G5 CGM](https://forum.fudiabetes.org/t/how-to-calibrate-a-dexcom-g4-g5-cgm/2049/8):
>
> The human eye deals with red light at night better than white.

That’s a myth, though 🙂 it’s the amount of light that matters, have a look at this article: [Doug Kniffen's Green Astrolights](http://www.astromax.org/activities/members/kniffen.htm).  
But it’s one myth I like because I spent many years at sea using red lights, so it carries some wonderful memories! I still have some of my sailing and navy night lights in the basement somewhere 🙂

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