40 hz light therapy
Skip itA small market ($55K/yr) — this niche doesn't clear our bar today.
Quality gap
Incredible3.9★avg incumbent rating — lower means beatable quality
Growth
Great+79.9%90-day search growth — must beat 0% to launch
Avg price
Great$101.02avg listing price — sweet spot $15–$100
Review moat
Good611.12avg incumbent reviews — the moat a new listing must climb
Returns
Okay4.5%return rate — above 6% kills the launch gate
Competition
Okay65%top-5 click share — leaders hold, buyers still browse
Conversion
Okay2.1%search→purchase rate — share of searches ending in a sale
Price range
Bad$29.41–$331.64cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad$55K$55K/yr · 26K searches
Brand share
Bad94%top-5 brand share — brand-locked demand
Competition
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.Brands
7 rising
Sellers
10
Top-5 brand share
94%
Open market
2%
- Gamma Light Therapy LLC32%
- DIGIPACE28%
- Free2Glow20%
- BRIGHT11%
- Verilux4%
- Brain spa4%
- Open — no brand owns it (1 brand, 2%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Clarity - 40Hz Lamp by Gamma - Cognitive Wellness - Brain Stimulating Light - Easy to Use - Memory Support
Gamma Light Therapy LLC$149.084.2★248 rev
Free2Glow 40Hz Therapy Light Bulb Improve Focus Memory & Mood for Seniors Easy to Use | 85265V Wide Voltage | E26 Base| 6000K Daylight | No Headache | Easy Daily Use
Free2Glow$38.934.0★20 rev
BEACON40 Light Therapy Gamma Lamp | 40Hz Gamma Waves for Memory Sleep & Focus Clarity | Memory Aid Cognitive Wellness & Biohacking Device
BRIGHT$331.644.2★70 rev
40Hz Light and Sound Therapy Wellness Glasses Device | Wearable Gamma Light and Sound Synchronized Machine for Mental Clarity
DIGIPACE$128.074.1★8 rev
DIGIPACE 40Hz Light-Sound Therapy Entrainment Wellness Kit Gamma E26 E27 9W Bulb and Audio Synchronizer Speaker
DIGIPACE$48.473.6★4 rev
Newest
by launch date
Brain Spa Good Sleep Headset for Relaxation & Bedtime Routine 40Hz Gamma Light & Bone Conduction Sound Rhythmic Massager Designed to Insomnia Relief Promote Calm Focus Meditation and Mental Rest
Brain spa$199.2928 rev
Free2Glow 40Hz Therapy Light Bulb Improve Focus Memory & Mood for Seniors Easy to Use | 85265V Wide Voltage | E26 Base| 6000K Daylight | No Headache | Easy Daily Use
Free2Glow$49.638 rev
40Hz Light and Sound Therapy Wellness Glasses Device | Wearable Gamma Light and Sound Synchronized Machine for Mental Clarity
DIGIPACE$128.078 rev
DIGIPACE 40Hz Light-Sound Therapy Entrainment Wellness Kit Gamma E26 E27 9W Bulb and Audio Synchronizer Speaker
DIGIPACE$48.474 rev
DIGIPACE 40Hz Light Gamma Flickering LED Bulb Lamp with Switchable Holder
DIGIPACE$34.364 rev
Trending
90-day click momentumFree2Glow 40Hz Therapy Light Bulb Improve Focus Memory & Mood for Seniors Easy to Use | 85265V Wide Voltage | E26 Base| 6000K Daylight | No Headache | Easy Daily Use
Free2Glow$49.632.6★
Brain Spa Good Sleep Headset for Relaxation & Bedtime Routine 40Hz Gamma Light & Bone Conduction Sound Rhythmic Massager Designed to Insomnia Relief Promote Calm Focus Meditation and Mental Rest
Brain spa$199.293.5★
DIGIPACE 40Hz Light-Sound Therapy Entrainment Wellness Kit Gamma E26 E27 9W Bulb and Audio Synchronizer Speaker
DIGIPACE$48.473.6★
Verilux HappyLight Luxe - Light Therapy Lamp with 10 000 Lux UV-Free LED Bright White Light with Adjustable Brightness Color Countdown Timer & Stand - Boost Mood Sleep Focus (White)
Verilux$65.814.5★
DIGIPACE 40Hz Light Gamma Flickering LED Bulb Lamp with Switchable Holder
DIGIPACE$34.364.7★
Demand & seasonality
Weekly Amazon search volume, last 75 weeks — +79.9% search growth over the last 90 days.Peak months: Apr · busiest ÷ quietest = 3.7×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The brightness options are great”
“This product really helps me sleep”
“Easy to operate”
“Good quality, love the choice of settings and timer”
“It does exactly what it says it does”
“it definitely calms the thoughts”
“Easy to use and nice and portable”
“Its incredibly soothing”
“the trade-off is absolutely worth it”
“Just the right size”
What buyers complain about
“Broken after 3 months”
“it wouldnt turn on”
“Hasn't helped my sleep”
“This is a piece of junk”
“Beware of charger”
“Too bright”
“A little pricey”
“Hard to use effectively”
“This machine is larger than I would prefer”
“found it uncomfortable”