921 Bulb
FailThe average product has 4,840 reviews to catch up to, so 921 Bulb is a Fail.
- Flapen Score
- 43 / 100Ranks 5,360 of 7,287 Automotive niches · −6 vs the category median of 4943
- Market size
- $147K/yr107K searches / yr
- 90-day growth
- +11.2%search demand this quarter
- Competition
- 60%top-5 click share · 16 brands · 56 sellers
Flapen Score
921 Bulb against its category
The dotted line is the Automotive average. Past it, 921 Bulb is stronger. Inside it, weaker.
Market
The 921 Bulb market on Amazon at a glance
Shoppers on Amazon United States searched for 921 Bulb 107K times last year and spent an estimated $147K. The top 5 brands take 83% of clicks. Flapen scores it 43 out of 100, a Fail.
01 · Demand
An estimated 12.8% of those searches ended in a purchase.
Shoppers searched for this 107K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 12.8% of those searches ended in a purchase. Searches in the last 90 days moved +11.2% against the 90 days before. Searches, conversion and average price together put the market at an estimated $147K a year.
- Searches, last 12 months
- 107K
- Growth, 90 days vs prior 90
- +11.2%
- Conversion, latest week
- 12.8%
- Market size, estimated
- $147Ka year
- Peak month
- May1.4× the quietest month
- Top search term
- 921 bulb67K searches a year
02 · Price
A sale here is worth $10.82.
Listings sell for $10.82 on average, from $3.67 to $25.07. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 1,000 to 1,250 of them. At $10.82 that is $11K to $14K a year per listing.
- Average price
- $10.82under the $15 to $100 sweet spot
- Price range
- $3.67–$25.07
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 13K–15K
- Units per listing a year
- 1,000–1,250
- Revenue per listing a year
- $11K–$14K
- Returns
- 3.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
88% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.7% of listings are out of stock. The average listing ranks #50 within Lights, Bulbs & Indicators. It carries 4,840 reviews at 4.58 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 88%
- Prime listings
- 100%
- Out of stock, average day
- 1.7%
- Average rank
- #50in Lights, Bulbs & Indicators
- Average rating
- 4.58 starsAmazon United States average 4.42 stars
- Average reviews
- 4,840per listing
- Listings tracked
- 25
04 · Newcomers
1 of last year's 5 launches cleared the first-year sales bar.
5 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 50 months on average, so the names here are settling in.
- Launched, last 12 months
- 5
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 50 months
Products
Top 921 Bulb products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
SYLVANIA - 921 SilverStar Mini Bulb - Brighter and Whiter Light Ideal for Center High Mount Stop Light (CHMSL) and More (Contains 2 Bulbs)
- Price
- $11.67
- Rating
- 4.6/5
- Reviews
- 914
- Age
- 15y ago

SYLVANIA 921 Basic Miniature Bulb (Contains 2 Bulbs) (921.BP2)
- Price
- $5.78
- Rating
- 4.6/5
- Reviews
- 1,019
- Age
- 19y ago

QYKAVM 921 Bulb 12-Pack 921 912 RV Light Bulbs for Reverse Light Brake Light Tail Light Signal Light 12V W16W Camper Light Bulbs Compatible with Automotive RV Camper - 921 Bulb Reverse Light
- Price
- $8.51
- Rating
- 4.7/5
- Reviews
- 85
- Age
- 9mo ago

Kadiby 12 Bulk Pack 921 Bulb Camper Rv 921ll 921cv 912ll T15 912 904 906 916 W16W Backup//Stop/Trunk Cargo/Signal Auto RV Camper Light Bulbs Fit for Accord Silverado Ram Pickup Cherokee
- Price
- $9.40
- Rating
- 4.6/5
- Reviews
- 226
- Age
- 1y ago

SYLVANIA - 921 Long Life Miniature - Bulb Ideal for Interior Lighting - Cargo and License Plate (Contains 2 Bulbs)
- Price
- $6.62
- Rating
- 4.5/5
- Reviews
- 1,370
- Age
- 20y ago
Trending
estimated 90-day click momentum
VCYOPN 12 PCS 921 Bulbs 12V/16W T15 Bright Light Bulb Replacement for Reverse Backup Brake Tail Signal Lights 906 912 W16W Miniature Bulbs Compatible with Cars RVs Campers (Clear)
- Price
- $6.89
- Rating
- 4.7/5
- Reviews
- 4
- Age
- 3mo ago

GIVEDOUA 921 T15 Bulbs 912 906 916 W16W Automotive Backup/High Mount Brake/Trunk Cargo/Interior Dome/Turn Signal Replacement Bulbs Fit for Most Sedans SUVs Pickup Trucks RVs and Campers(10 Pack)
- Price
- $7.23
- Rating
- 5.0/5
- Reviews
- 2
- Age
- 1mo ago

AUXITO 921 LED Bulb Reverse Light 400% Bright 912 T15 6000K White Canbus Error Free W16W 906 904 Backup Replacement Parking Light Assemblies For Car/Trunk Pack of 2
- Price
- $11.68
- Rating
- 4.6/5
- Reviews
- 11,013
- Age
- 7mo ago

ALKOREY W16W T15 912 921 12V 16W Back-up Reverse Lights Car Turn Signal Bulbs 2700K Warm White Automobile Lamps 2 Pack
- Price
- $6.72
- Rating
- 4.3/5
- Reviews
- 39
- Age
- 1y ago

QYKAVM 921 Bulb 12-Pack 921 912 RV Light Bulbs for Reverse Light Brake Light Tail Light Signal Light 12V W16W Camper Light Bulbs Compatible with Automotive RV Camper - 921 Bulb Reverse Light
- Price
- $8.51
- Rating
- 4.7/5
- Reviews
- 85
- Age
- 9mo ago
Newest
by launch date
GIVEDOUA 921 T15 Bulbs 912 906 916 W16W Automotive Backup/High Mount Brake/Trunk Cargo/Interior Dome/Turn Signal Replacement Bulbs Fit for Most Sedans SUVs Pickup Trucks RVs and Campers(10 Pack)
- Price
- $7.23
- Rating
- 5.0/5
- Reviews
- 2
- Age
- 1mo ago

VCYOPN 12 PCS 921 Bulbs 12V/16W T15 Bright Light Bulb Replacement for Reverse Backup Brake Tail Signal Lights 906 912 W16W Miniature Bulbs Compatible with Cars RVs Campers (Clear)
- Price
- $6.89
- Rating
- 4.7/5
- Reviews
- 4
- Age
- 3mo ago

AUXITO 921 LED Bulb Reverse Light 400% Bright 912 T15 6000K White Canbus Error Free W16W 906 904 Backup Replacement Parking Light Assemblies For Car/Trunk Pack of 2
- Price
- $11.68
- Rating
- 4.6/5
- Reviews
- 11,013
- Age
- 7mo ago

QYKAVM 921 Bulb 12-Pack 921 912 RV Light Bulbs for Reverse Light Brake Light Tail Light Signal Light 12V W16W Camper Light Bulbs Compatible with Automotive RV Camper - 921 Bulb Reverse Light
- Price
- $8.51
- Rating
- 4.7/5
- Reviews
- 85
- Age
- 9mo ago

UNLRAE 10PCS 921 Bulb Car Accessories T15 12V Ultra-Bright Camper Light Bulbs Automotive Replacement 921 Miniature Bulb RV Light Bulbs Cars Interior Accessories Suitable for Cars Trucks SUVs RVs
- Price
- $7.46
- Rating
- 4.8/5
- Reviews
- 8
- Age
- 10mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 60% of clicks. Leaders hold, but buyers still shop past them.
Brands
16 rising
Sellers
56
Est. top-5 brand share
83%
Top 20: 100%
Est. top-5 click share
60%
Top 20: 95%
Open market
15%
- SYLVANIA50%
- Kadiby12%
- QYKAVM10%
- AUXITO7%
- ALKOREY3%
- SEALIGHT2%
- Open — no brand owns it (10 brands, 15%)
Demand
921 Bulb search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top 921 Bulb search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- 921 bulb67K/yr
- 921 brake light bulb7K/yr
- 921 light bulb7K/yr
- sylvania 921 bulb8K/yr
- sylvania 9216K/yr
- 921 bulbs6K/yr
- bulb 9213K/yr
- 921ll bulb3K/yr
Reviews and returns
What reviews say buyers love and hate about 921 Bulb
We read the reviews and the return reasons for every product selling here.
“not long lasting”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 921 Bulb questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









