From Sun to Screens: The Secret Skin-Damaging Light You Also Need to Block
With Daylight Savings Time in full swing, the days are getting longer, brighter, and sunnier—which means more exposure to harmful UV rays. But did you know that the sun isn’t the only source of damaging light? Blue light from screens and infrared heat from daily life can also contribute to premature aging and skin damage.
If you’re still wondering whether daily SPF is necessary (spoiler: it is!), let’s break down everything you need to know about broad-spectrum protection, SPF numbers, and which sunscreen is right for you—and I’ll share some of my top SPF recommendations from Dermalogica and Face Reality to keep you protected and glowing.
Why SPF Matters Year-Round
Sunscreen isn’t just for summer days at the beach. The increase in daylight hours means more exposure to the sun’s damaging rays—even if you’re just running errands, driving, or sitting by a window. UV rays penetrate clouds and windows, so even on overcast days or while indoors, your skin is at risk.
UVA & UVB: The Two Types of Sun Damage
UVA rays penetrate deep into the skin, causing wrinkles, fine lines, collagen breakdown, and premature aging.
UVB rays affect the surface, leading to sunburns and increasing skin cancer risk.
Broad-spectrum sunscreen protects against both, making it essential for daily wear.
But UV rays aren’t the only concern.
Harmful Light Sources You Might Not Think About
Beyond the sun, your skin is also exposed to:
☀️ Infrared Radiation (IR-A): Heat from the sun, electronic devices, and even cooking appliances can break down collagen, leading to loss of skin elasticity and increased signs of aging.
📱 Blue Light (HEV Light): Emitted from screens (phones, computers, tablets), blue light penetrates even deeper than UV rays and contributes to hyperpigmentation, premature aging, and oxidative stress.
Protecting your skin from these hidden dangers requires more than just SPF—it calls for antioxidants and infrared protection, too!
Time-out. Why is LED light therapy good for the skin?
I get asked this often and it's a great question. The LED lights used by dermatologists and estheticians are not harmful to the skin because they are designed to work at controlled wavelengths, intensities, and exposure times to provide therapeutic benefits rather than cause damage. Here’s why:
1. They Use Specific Wavelengths for Skin Health
Professional LED devices emit light at precise wavelengths that stimulate cellular processes rather than cause oxidative stress.
Common wavelengths used in skincare:
Red Light (630–660 nm) → Boosts collagen, reduces inflammation, and promotes healing.
Blue Light (415 nm) → Targets acne-causing bacteria (P. acnes) without harming skin.
Near-Infrared Light (830 nm) → Penetrates deeper to reduce inflammation and support wound healing.
2. No Harmful UV or Excessive HEV Light Exposure
Unlike sunlight, tanning beds, or unregulated LED sources, professional LED devices do not emit UVA/UVB rays, which are responsible for DNA damage and photoaging.
Some blue light wavelengths can cause oxidative stress in uncontrolled exposure (like from screens), but clinical blue light therapy is delivered in short, therapeutic bursts rather than prolonged exposure.
3. Controlled Energy Output & Treatment Time
In dermatology and esthetics, LED treatments are timed and dosed properly to maximize benefits while minimizing risks.
Overuse of LED masks or handheld devices at home (especially with unregulated brands) could theoretically lead to mild irritation, but professional-grade devices are calibrated for safe, effective treatments.
4. No Heat Damage (Unlike Infrared or UV Exposure)
Unlike infrared radiation from heat sources, professional LED therapy does not produce excess heat that breaks down collagen.
Treatments also feel gentle and comfortable, making them safe for sensitive skin.
Takeaway: LED Therapy is Safe, Targeted, and Clinically Proven
When used correctly, LED therapy supports skin rejuvenation, healing, and acne treatment without the negative effects of unregulated blue light, UV, or infrared radiation.
SPF: What Do the Numbers Really Mean?
SPF (Sun Protection Factor) measures how much longer your skin can be exposed to UVB rays before burning compared to no sunscreen. Here’s what different SPF levels block:
SPF 15 blocks ~93% of UVB rays
SPF 30 blocks ~97%
SPF 40 blocks ~97.5%
SPF 50 blocks ~98%
SPF 70 blocks ~98.6%
Physical vs. Chemical Sunscreens: What’s the Difference?
Physical Sunscreens (Mineral-based): Contain zinc oxide and/or titanium dioxide to create a barrier that reflects UV rays.
Best for sensitive skin, rosacea, post-treatment recovery, and kids.
Works immediately after application.
Can sometimes leave a white cast.
Chemical Sunscreens: Contain ingredients like avobenzone and oxybenzone that absorb UV rays and convert them into heat.
Ideal for daily wear, under makeup, and water-resistant formulas.
Needs 15-20 minutes to activate.
Can sometimes cause irritation for sensitive skin.
How to Layer Sunscreen with Your Current Skincare Routine
Applying sunscreen correctly is key to maximizing its protection and ensuring it works well with your skincare routine. Follow these simple steps for the best results:
1️⃣ Cleanse – Start with a gentle cleanser to remove oil and impurities.
2️⃣ Treat (Serums & Actives) – Apply your vitamin C, hyaluronic acid, or other treatment serums. These help brighten, hydrate, and prep your skin.
3️⃣ Moisturize – Use a lightweight moisturizer if your skin needs extra hydration. If your moisturizer already contains SPF, like Dermalogica’s New Biolumin-C Heat Aging Protector SPF50, you can skip the next step!
4️⃣ Sunscreen (SPF 15 or Higher) – Apply a broad-spectrum sunscreen.
5️⃣ Makeup (If Wearing It) – Once your sunscreen has set for a minute or two, apply your primer, foundation, and other makeup products. Tip: Look for an SPF-infused primer like Dermalogica’s SkinPerfect Primer SPF 30 for added protection!
💡 Bonus: If you’ll be outside for long periods, reapply sunscreen every 2 hours
Sunscreens for Every Skin Type
Below are top-rated sunscreens from Dermalogica and Face Reality, delivering skin-enhancing formulas and broad-spectrum protection:
✔️ NEW Biolumin-C Heat Aging Protector SPF 50 – A vitamin C-powered SPF moisturizer that defends against heat aging and sun damage while brightening and hydrating the skin. Perfect if you're concerned with dullness, fine lines, and environmental damage.
✔️ SkinPerfect Primer SPF 30 – A tinted primer with SPF 30, great if you want sun protection plus a smooth, radiant base for makeup. Contains peptides and antioxidants to support skin health while evening out the complexion.
✔️ Porescreen SPF 40 – A multitasking sunscreen that blurs imperfections, gives a natural glow, and provides SPF 40 protection. Great for normal to oily skin types who want a smooth finish.
✔️ Invisible Physical Defense SPF 30 – A 100% mineral sunscreen that’s lightweight and doesn’t leave a white cast, perfect for sensitive skin or post-treatment care.
✔️ Dynamic Skin Recovery SPF 50 – A daily anti-aging SPF moisturizer that hydrates while protecting from UVA/UVB and environmental damage. Ideal for dry or mature skin.
Face Reality Sunscreen (Best for Acne-Prone Skin!)
✔️ Mineral Matte SPF 28 – A lightweight, non-pore-clogging formula that won’t break you out. Perfect for anyone with acne-prone or sensitive skin who still needs strong sun protection.
✔️ Daily SPF 30 Lotion – A broad-spectrum, lightweight sunscreen that provides hydration without feeling greasy. Works well under makeup!
Sunscreen Alone Isn’t Enough: Why a Hat is a Must
Even the best sunscreen needs a little backup! A wide-brimmed hat (at least 3 inches) provides extra protection by:
Blocking direct sunlight from hitting your face and neck.
Reducing UVA rays that can still penetrate sunscreen.
Shielding your scalp, ears, and back of the neck—often forgotten spots!
For the best protection, combine broad-spectrum sunscreen, a hat, and sunglasses whenever you're outdoors.
Not Sure Which SPF is Right for You?
I’d love to help you find the perfect sunscreen for your skin type and lifestyle. You can reach me at afsc336@gmail.com or by texting or calling 336.408.7512.
