SPARX Wireless Teeth Whitening Kit with LED Light for Sensitive Teeth Remove Stains Like Coffee, Smoking, Wine. Whiten Smile for Long Lasting Results, Includes 3 Gel Syringes, 1 Dual LED Mouthpiece

White, whiter, whitest?
I have used the Sparx tooth whitening system for 8 applications. For reference, I have used Crest tooth whitening strips in the past. Those peroxide strip applicators were relatively easy to use, seemed to work, but often left me with some tooth discomfort (temporary sensitivity to temperature) which can occur with tooth whiteners.LED + peroxide gel combos seem to have a mixed response from the dental profession, even from those that use lighting activation during office visits. I would guess some of that is based on the variety of stains dentists might observe in normal patients and how effective a given treatment might be towards those stains.Onto Sparx! After a couple of gel brushings, for which I start salivating (diluting the gel), I changed course. I slathered some of the gel into the tray, along with a quick painting of my teeth, in order to get things done a bit quicker. I was careful to avoid getting gel up on my gums, and did not experience any pain or tissue bleaching that can happen with peroxide.The brush applicator is a disposable twist-type syringe that is relatively easy to use. Each tube (three provided) lasts 4-5 applications for me, just treating front teeth with some “slather”, so the whole kit should provide 2-3 weeks of treatments.Once you have applied the gel you put the tray into your mouth and turn on the light. The first setting is blue light, the second red+blue. It is not clear what the actual treatment wavelength range may be, but presumably it is in some uV range. The instructions and website are less informative about which LED option is better. Blue is timed at 15 minutes. Red+blue at 10 minutes. During treatment you can feel the peroxide bubbling from exposure to the light. It feels like pop-rocks! The timer beeps and the light goes off. A quick rinse of the tray and you are done. The charge on the LED tray lasts two sessions. The USB to proprietary connecting cable is provided but you provide the actual wall charger.Eight sessions. No temporary sensitivity experienced during or after each session. I think it is working.I had a professional cleaning in the past month, but have not used whitening agents for a couple of years (too much tooth discomfort). For the pictures, I am using a Pixel 6 with the same lighting each time. I do not have control over the white balance, which can influence how “warm” (re: more yellow) the images appear. My front teeth are not bright white, but do seem to fall in between the 1 and 2 tooth chart color provided with the Sparx.My impression is that my teeth do appear whiter after 8 applications. It is a bit subjective. Peroxide is an established whitening agent, and again, depending on the condition of your teeth, it should work with proper application.Years ago, a dental tech gave me some good advice. If you drink coffee, tea, wine, or carbonated drinks (especially the very acidic ones like colas), you should always rinse your mouth out a couple of times after finishing your beverage. For me, morning coffee consumption was the primary source of teeth discoloration, but since I started practicing the rinse, they do stay whiter in between cleanings. I think some regular use of the Sparx LED Whitening System will also help. I plan on continuing to use it.

Easy to use but no immediate results and unclear instructions
This teeth whitener system is a new one for me – I’ve never seen light-based whitening kits for home use before! It’s pretty easy to use. It comes with three tubes of whitening gel, which work a little like some lip glosses I’ve had in the past – you twist the bottom and the gel squeezes out through the brush at the top. You paint this on your teeth, pop the tray in your mouth, and turn it on. It can do blue (15 minutes) or red and blue (10 minutes). The manual doesn’t really indicate which is better, or why there’s a time difference – red and blue is supposed to help with gums? But otherwise, information is very lacking. The device is super easy to turn on (too easy, really – I ended up cycling through the colors multiple times while removing it from the box and putting it in my mouth). It’s easy to charge, too, with a little magnetic USB charging cable (but you need to provide the plug). My teeth were at a 2-3 (top) and 3-4 (bottom) based on their little included color chart, and after a few uses, I haven’t seen a change. No problems with tooth sensitivity so far, so that’s good. The instructions don’t clearly indicate how often to use it or how many times you need to use it before seeing results. I’ve had a couple of colds since getting it, so I haven’t been able to use it as much as I hoped: the tray pretty much prevents you from breathing through your mouth, and if your nose is stuffed up, it’s impossible to use. I’ll keep using it and update if I get noticeable changes.