Most users notice visible whitening after 3-5 consecutive daily treatments (15 minutes each). For dramatic results, we recommend using daily for the first week, then 2-3 times per week for maintenance. Results vary based on starting tooth shade and stain severity, but the dual LED technology accelerates the whitening process for faster results than traditional at-home methods.

Yes! LED teeth whitening is completely safe for enamel when used as directed. The blue LED light activates the whitening gel without generating heat or causing damage to tooth structure. Our professional-grade formula is specifically designed to lift stains from within the enamel without eroding or weakening it. The addition of red LED light also promotes gum health and reduces any potential sensitivity.

The Petal Whitening Combo is designed to minimize sensitivity. Our dual LED system includes red light therapy, which reduces gum inflammation and sensitivity during the whitening process. Most users experience little to no sensitivity. If you have historically sensitive teeth, we recommend starting with every-other-day treatments and using a sensitivity toothpaste beforehand.

The blue LED light (wavelength 460-465nm) activates the whitening gel's hydrogen peroxide, accelerating the breakdown of stain molecules within the enamel for faster, more effective whitening. The red LED light (wavelength 620-625nm) provides therapeutic benefits by reducing inflammation, promoting healing, and minimizing sensitivity in the gums. Together, these lights deliver professional-level results with maximum comfort.

The Petal Whitening Combo is safe to use with dental work, but it will only whiten natural tooth enamel—not veneers, crowns, bonding, or fillings. If you have visible dental work on your front teeth, whitening may result in color mismatch. We recommend consulting your dentist before starting any whitening treatment if you have extensive dental work.

Each whitening gel pen contains enough gel for approximately 10-15 applications, depending on how much you use per treatment. With your initial purchase of 3 pens, you have enough for 30-45 treatments. We recommend subscribing for automatic bi-monthly refills so you never run out.

Yes! The Petal Whitening Light is IPX7 rated, meaning it's fully waterproof and submersible. You can safely use it in the shower, bath, or while washing your face—making your whitening routine completely hands-free and convenient. Just rinse it clean after each use.

After each use, rinse the mouthpiece under warm water to remove any gel residue. You can use a soft toothbrush with mild soap for deeper cleaning once a week. Allow it to air dry completely before storing. The device is USB rechargeable, so charge it when the indicator light shows low battery (typically every 2-3 weeks with daily use).

Yes, with the subscription option, you'll receive 3 whitening gel pens automatically every month, and your payment method will be charged at the subscription rate (15% off retail). You have full control to skip months, adjust delivery frequency, pause, or cancel anytime through your account dashboard with no commitments or cancellation fees.

Yes! Once you have the Petal Whitening Light, you can purchase gel pen refills separately either as a one-time purchase or through our money-saving subscription. The LED device is reusable and lasts for years, so you only need to replenish the whitening gel.

LED whitening systems like the Petal Combo are significantly more effective than strips. Strips only coat the surface with gel and don't use light activation, leading to slower, less dramatic results. They're also messy, hard to keep in place, and often cause sensitivity because the gel contacts gums. The Petal system uses LED light to accelerate whitening, molds comfortably to your teeth, protects gums with red light therapy, and is completely hands-free.