[nisegami]

>The biggest game changer: Sunlight in your eyes within 30 minutes of waking up.

I don't think the sun rises for another hour after I wake up for work.

[originalvichy]

Buy a wake-up light alarm clock. Costs max. 50€ for a base version. Popular here in the Nordics for obvious reasons.

[acchow]

The suggestion is sunlight without sunglasses after waking up. That is extremely bright light hitting your eyes. Wake-up alarm clocks may be helping you, but not as a substitute for whatever is being suggested here.

[paulintrognon]

You can emulate this effect via Dawn Simulators