[ExI] Red light for aging eyes

[Anton Sherwood]

On 2020-7-28 16:11, Stuart LaForge via extropy-chat wrote:
> A few days ago, I hooked up a 40W 660nm deep red LED light bulb sold
> as a plant grow light in my room and I have been using it as my
> reading lamp for a few minutes every night before bed.

Romana Machado iirc used a secondhand red traffic light for a similar 
purpose.

-- 
*\\*  Anton Sherwood  *\\*  www.bendwavy.org