The Beauty of Joseon Light On Serum combines centella asiatica with vitamin C, aiming to give skin a brighter, more even look while keeping the formula comfortable. It is a good choice for people who are new to vitamin C or who have found strong vitamin C serums too intense. Use it in the morning under sunscreen, be consistent, and expect gradual rather than overnight changes.
Key facts
| Detail | Light On Serum |
|---|---|
| Hero ingredients | Centella asiatica, vitamin C |
| Texture | Light serum |
| When to use | Morning (or evening) |
| Best for | Dullness, uneven-looking tone, vitamin C beginners |
| Pairs with | Daily SPF |
Why vitamin C is popular
Vitamin C is one of the most widely used skincare ingredients for brightening and for its antioxidant role. Applied in the morning under sunscreen, it complements daily UV protection. The challenge is that some vitamin C serums can feel tingly or irritating, and pure vitamin C can be unstable once opened. Different products use different forms of vitamin C, so check the ingredient list if you want to know which one a product uses.
Centella asiatica, sometimes called cica, is a plant extract widely used in Korean skincare for its soothing feel. The pairing in Light On Serum is designed to give a brightening step with a comfortable feel.
What we like
- Beginner-friendly approach to vitamin C.
- Lightweight texture that layers easily under moisturizer and sunscreen.
- Fits a short routine without needing extra steps.
What to keep in mind
- Results are gradual. Plan for several weeks of consistent use.
- Sensitive skin can still react to any vitamin C product, so patch test.
- Sunscreen is essential. Brightening serums cannot do their job if skin is unprotected from UV.
How to use the Light On Serum
- Cleanse in the morning, or rinse with water.
- Optional: pat in Ginseng Essence Water.
- Apply two or three drops of Light On Serum to face and neck.
- Follow with a moisturizer such as Red Bean Water Gel or Dynasty Cream.
- Finish with Relief Sun.
A beginner start-up plan
| Week | Plan |
|---|---|
| 1 | Every second morning |
| 2 | Most mornings |
| 3 onward | Daily, if comfortable |
If you feel stinging that does not settle within a minute, redness, or itching, stop and reassess. Comfort is the goal.
Can you use Light On Serum with niacinamide?
Yes. The old idea that niacinamide and vitamin C should never be combined is widely considered outdated for modern formulas. Many people apply one after the other, or use vitamin C in the morning and niacinamide (for example, the Glow Serum) at night. Our niacinamide and vitamin C layering guide explains your options.
Light On Serum vs Glow Deep Serum
Both target a brighter, more even look. Light On Serum relies on vitamin C and centella, while Glow Deep Serum uses rice and alpha-arbutin. The best pick depends on your skin and preferences; see our Light On vs Glow Deep comparison.
Who should buy it?
- Vitamin C beginners.
- People with dull-looking skin who want a simple brightening step.
- Those who found stronger vitamin C serums uncomfortable.
- Anyone building a morning routine around sunscreen.
Who might skip it?
- People who already use a vitamin C product they love.
- Very reactive skin during a flare-up; focus on calming products like the Calming Barrier Serum first.
Storage tips
Vitamin C products can be sensitive to light, heat and air. Keep the cap tightly closed, store the bottle away from sunlight and heat (not on a sunny windowsill), and use it within the period shown on the packaging. If the serum changes colour noticeably or smells different, it may be past its best. Read more in our storage guide.
Realistic expectations
Expect skin to look fresher and more even over time with consistent use and daily sunscreen. Stubborn dark spots, melasma and post-acne marks vary a lot in how they respond. If you have pigmentation that changes, spreads or worries you, consult a doctor or dermatologist.
Verdict
Light On Serum is a thoughtful option for anyone who wants to add vitamin C without overcomplicating things. Use it in the morning, follow with moisturizer and SPF50+, and give it time.
Pairing Light On Serum with the rest of your routine
At night, you can follow your usual routine with a hydrating serum such as Revive Serum or a brightening serum such as Glow Deep Serum. Keep exfoliation on separate nights to reduce irritation.
Where to buy in Canada
See details and current Canadian buying options on our Light On Serum page, and pair it with Relief Sun for daily protection.
FAQ
Should I use Light On Serum in the morning or at night?
Morning is common because vitamin C pairs well with sunscreen, but evening use also works if that suits your routine.
Can I use it with the Glow Serum?
Yes. You can layer them, thinnest first, or use Light On Serum in the morning and Glow Serum at night.
Is Light On Serum good for sensitive skin?
It is designed with a comfortable feel in mind, but sensitive skin can react to any product. Patch test and start every other day.
What happens if my vitamin C serum changes colour?
A noticeable colour or smell change can be a sign that the product has degraded. When in doubt, replace it.