I bought a SAD lamp in the 90s and found it didn't do much for me, but I gave it to a friend who seemed to find it helpful.
However, you've prompted me now to try again playing with ordinary lamps on timers with bulbs with different colour temperatures (kelvin ratings). My bedside lamp is rather pink-ish, but I find East sunrise through my pale green curtains helps to wake me a bit. I wonder how hard it would be to find a green-tinge bulb before winter.
You've also prompted me to research not just the general 'blue keeps you awake' stuff but whether strong doses of blue earlier in the day would help to re-set my clock.
So that doesn't help you much, except to know that a '90s SAD lamp didn't help me but helped someone else, but you've helped me by prompting me to experiment.