How to Choose Window Tint Darkness & TSER for Your Climate (2026 Guide)
How to Choose Window Tint Darkness & TSER for Your Climate
If you've ever stared at a tint percentage and wondered what it actually means for your daily drive, you're not alone. Choosing the right window film comes down to two numbers: VLT (Visible Light Transmission) and TSER (Total Solar Energy Rejected). Here's how to read them — and how to pick the right combination for where you live.
What Is VLT?
VLT is the percentage of visible light that passes through the film. Lower VLT = darker tint.
- 70% — Nearly clear; legal everywhere; great for windshields
- 35% — The most popular shade; balanced privacy and visibility
- 20% — Dark; strong privacy; check your state's legal limit first
- 5% — Limo tint; maximum privacy; typically rear-windows only
What Is TSER?
TSER measures how much total solar energy (heat + UV + infrared) the film blocks. A 79% TSER film rejects nearly 4 out of every 5 units of solar energy hitting your glass — that's the difference between a car that bakes and one that stays cool.
Matching TSER to Your Climate
| Climate | Recommended TSER | Why |
|---|---|---|
| Hot & sunny (CA, TX, AZ, FL) | 75–99% | Maximum heat rejection is worth every penny |
| Moderate (PNW, Midwest) | 70–79% | Good balance of heat and glare control |
| Cold/overcast (Northeast, Canada) | 50–70% | Prioritize UV protection over heat rejection |
Our Recommendations
- Classic IR 90 — 90% IR rejection, ideal for daily drivers in moderate climates → Shop Classic IR 90
- Classic IR 99 — 99% IR rejection, our top performer for extreme heat → Shop Classic IR 99
- Precut Nano Ceramic Kit (TSER 79%) — Best for DIYers who want professional-grade heat rejection without the shop visit → Shop Precut Kit
Browse the full Classic IR Series or Precut Kits.
