Light compression (8-15 mmHg) is an excellent starting point if you're new to compression socks. It gives you a gentle, supportive hug around your calf and foot without feeling tight or restrictive. You'll notice a subtle "held-in" sensation, but it shouldn't feel constricting or uncomfortable at all.
This level is ideal for all-day resort skiing where you want some fatigue reduction without constantly thinking about your socks. It mildly improves blood flow, which helps keep your feet warmer and less tired by last chair. It's also more forgiving on sizing than higher compression levels, where a poor fit can actually restrict circulation rather than help it.
If you're curious about compression but worried it'll feel too tight or be a struggle to pull on, light compression is the safe bet. You can always step up to moderate (15-20 mmHg) later if you want more noticeable performance benefits.