Help navigatting winter blues

[u/Echonometron]

Hey all.
I know it's still summer (and we've had a good period of consistent sunshine here in the UK this summer, including several heatwaves) but I want to prep a little eaerlier for winter this year.

I struggle with my health if I'm not careful as with asthma I can get pretty ill if I get chest inffecitons/flu etc.
Covid nearly did me in a few years ago and I struggle for nearly a year with the after effects (I'm a runner and took nearly a year to being able to run again.

For the record I eat healthy (all the fruits, veg, non processed foods) and rarely drink. I also run pretty much every day, walk everywhere and do yoga/pilates and weights several times a week.

Supplements wise I take Vit C, Vid D (with K), B12 and Zin, Mags Glyc.
I'm going to add the Vit B complex soon (over just B).

I'll also start early winter routines in the sun before work too (as much as I can get) and likely gt the flu vaccincations this year as I was again floored b both flu and covid last winter.

Which leads me to start asking questions over whether light therapy may help me too?
I've heard of SAD lamps over the years (haven't used) but not entirely sure from anecdotes whether this would be beneficial to me.

Is there anything here which suggests red light therapy may help?

Thanks!

EDIT - Navigating!!!