p21w bulb
Skip it38/100a small market ($83K/yr) — p21w bulb doesn't clear our bar today.
Market/yr
$83K
Growth (1y)
+139.9%
Products
15
Brands
10
was 9 a year ago
Sellers
79
Price range
$5.75–$98.78
Returns
3.1%
Rating
4.5★
Skip it
Scored 38/100 across market size, growth, competition, quality gap, and returns.
Demand
Weekly Amazon search volume, last 101 weeks — +139.9% year over year.Seasonality
Monthly demand index across the year — 1.00 is average.No pronounced peak months · busiest ÷ quietest = 1.5×
Competition
- SYLVANIA48%
- Hella21%
- Kadiby17%
- Sony3%
- Rafeal Auto3%
- AUTOONE2%
- Other (4 brands)6%
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack. 10 brands and 79 sellers compete here.
Brands
10 rising
was 9 a year ago
Sellers
79
Top 5 brand share
92%
Product shelf
All 15 tracked products in this niche.
SYLVANIA - 7506 Long Life Miniature - Bulb Ideal for Daytime Running Lights (DRL) and Back-Up/Reverse Lights (Contains 2 Bulbs)
SYLVANIA
$7.284.7★649 reviews
Hella 7506TB Bulb 7506 12V 21W Ba15S S8 (2)
Hella
$5.754.5★1,105 reviews
SYLVANIA 7506 Basic Miniature Bulb (Contains 2 Bulbs)
SYLVANIA
$6.174.7★1,411 reviews
SYLVANIA - 7506 SilverStar Mini Bulb - Brighter and Whiter Light Ideal for Daytime Running Lights (DRL) and Back-Up/Reverse Lights (Contains 2 Bulbs)
SYLVANIA
$11.534.6★4,657 reviews
Kadiby 2 Pack 7506 Bulb Brake/Back Up/Reverse Light Bulbs 7506LL 1156 P21W 12V 17635 Ba15s Longer Life Daytime Running Lights(DRL) Rear Turn Signal for VW Jetta Beetle Eurovan Passat Corrado Golf
Kadiby
$8.654.2★21 reviews
Kadiby 12 Bulk Pack 1156 Bulb P21W S25 1141 7506 Ba15s 12v 32cp Automotive Brake/Back Up/Reverse Light Clear Miniature RV Bulbs Fit for Aveo/Ram Pickup/Hammer
Kadiby
$9.974.6★1,210 reviews
Sony MDR7506 Professional Large Diaphragm Headphone
Sony
$98.784.7★28,118 reviews
Rafeal Auto 1156 Light Bulb 10 Pack S25 P21W Automotive Brake Light Turn 1156 7506 Miniature Bulb Mini Bulb Taillight Turn Signal Light Replacement for Cars Trucks SUVs
Rafeal Auto
$9.594.6★237 reviews
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Clear and crisp sound”
“Brightness is good”
“Durable build quality”
“Good snug fit”
“Can't beat the price”
“they are comfortable”
“Reliable and great”
“as advertised”
“Easy upgrade”
“Works perfectly”
What buyers complain about
“But the tight fit is a bummer”
“these are definitely going to break”
“These are complete garbage”
“the sound quality is terrible”
“they are not the most comfortable headphones”
“Wrong info”
“Waste of money”
“Product malfunction”
“Tried to put the first bulb on the right side a week later, don't work”
“The bass is almost non-existent”
Top return reasons
- Size-Overall31%
- Compatibility-Overall16%
- Audio Quality11%
- Comfort-Overall6%
- Advertised Vs Actual Product5%
- Functionality-Overall4%
- Value For Money4%
- Connectivity-Overall3%
- Product Condition3%
- Defective Material/Parts3%