---
title: "Py21w Bulb — $57K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/py21w-bulb"
last_updated: "2026-08-07T16:52:58.673Z"
locale: en
meta:
description: "Niche score 45/100 · $57K/yr market · 50K searches/yr · $17.35 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $57K/yr market · 50K searches/yr · $17.35 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Py21w Bulb — $57K/yr Amazon US Niche (2026) - Flapen"
---
# **py21w bulb**
**Skip it**
A small market ($57K/yr) — this niche doesn't clear our bar today.
Market size 14Growth 19Conversion 72Competition 52Returns 23Price range 81Avg price 81Brand share 72Review moat 33Quality gap 55
**Avg price**
**Great****$17.35**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$7.13–$52.53**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.7%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****62%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****54%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****3,248.25**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Bad****5.6%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-11.0%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$57K**
$57K/yr · 50K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, py21w bulb is a $57K/yr Amazon United States market (50K searches/yr). The top 5 brands hold 62% of demand. Verdict: Skip it — 45/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **py21w bulb market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$52K–$69K**
- units × avg price
- **Conversion rate**
- **6.7%**
- **Avg BSR**
- **#1,011**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **71%**
- **Out of stock**
- **2.5%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **178 days**
## **Competition & brand share**
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**20 **▲rising
**Sellers**
**51**
**Top-5 brand share**
**62%**
Top 20: 100%
**Top-5 click share**
**54%**
Top 20: 94%
**Open market**
**31%**
- SYLVANIA14% - ALKOREY13% - AUXITO12% - AUXLIGHT12% - BlyilyB10% - OXILAM7%
## **Demand**
Weekly Amazon search volume, last 31 weeks — -11.0% search growth over the last 90 days.
1K750Spike '26Dec '25Jan '26Feb '26Mar '26Apr '26May '26
[**Open Trend **](https://flapen.com/research/us/automotive/py21w-bulb/trend)
## **Top py21w bulb search terms**
- **py21w bulb**12K/yr-10.2%6.5% conv. - **7507 led bulb**10K/yr-14.4%5.5% conv. - **7507 bulb**8K/yr+15.6%8.3% conv. - **py21w led bulb**6K/yr-5.7%5.1% conv. - **py21w**6K/yr-11.1%6.0% conv. - **7507 led bulb amber**4K/yr-50.2%4.7% conv. - **py21w led bulb amber**3K/yr-43.1%6.5% conv. [**All search terms **](https://flapen.com/research/us/automotive/py21w-bulb/search-terms)
## **Top py21w bulb products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%4%$2K8%$5K12%$7K16%$9K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SYLVANIA - 7507 Long Life Miniature - Bulb Ideal for Turn Signal Applications (Contains 2 Bulbs)**SYLVANIA**$8.17**4.5★335 rev](https://www.amazon.com/dp/B01LX8ZU3L) [2**AUXLIGHT 7507 1156(150) BAU15S LED Bulbs Extremely Bright PY21W 12496 7507AST 2641A Replacement for Turn Signal Lights 2200K Amber Yellow (Pack of 2)**AUXLIGHT**$19.44**4.5★407 rev](https://www.amazon.com/dp/B0BBZV7V5K) [3**AUXITO CANBUS 7507 BAU15S LED Bulbs Amber Yellow with Built-in Resistor PY21W 12496 2641A 1156(150) Anti Hyper Flash Error Free Front Rear Turn Signal Lights and Blinker Parking Lights Pack of 2**AUXITO**$36.14**4.5★35,933 rev](https://www.amazon.com/dp/B0GS54YR8S) [4**ALKOREY-1156 S25 PY21W Miniature Bulb 2100K Amber Light 12V 21W Ba15s Replacement for Turn Signal Lights Back-Up/Reverse Lights 2 Pack**ALKOREY**$7.16**4.1★61 rev](https://www.amazon.com/dp/B0DZCQTQ9N) [5**BlyilyB 2-Pack 9-30V BAU15S PY21W 7507 High Brightness Low Power Amber Yellow LED Bulbs Replacement For Turn Signal Lights**BlyilyB**$9.65**4.4★319 rev](https://www.amazon.com/dp/B0837SZZRW)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**AUXITO CANBUS 7507 BAU15S LED Bulbs Amber Yellow with Built-in Resistor PY21W 12496 2641A 1156(150) Anti Hyper Flash Error Free Front Rear Turn Signal Lights and Blinker Parking Lights Pack of 2**AUXITO**$36.14**35,933 rev2mo ago](https://www.amazon.com/dp/B0GS54YR8S) [**Auxbeam 2026 B2 Series BAU15S LED Bulb Amber Soft Light Long Life 400% Brighter 7507 PY21W Bulbs for Turn Signal Blinker DRL Parking Lights (Need Resistors for Brake or Turn Signal Light Use)**Auxbeam**$16.83**821 rev4mo ago](https://www.amazon.com/dp/B0GQZ1KCHL) [**Flosser Incandescent BAU15s PY21W 7507 21W 667101 Amber Turn Signal Light Bulbs Replacement Lamp (Pack of 2) Made in Germany**FL�SSER**$9.97**4 rev7mo ago](https://www.amazon.com/dp/B08GSR3X9K) [**Auxbeam B21 Series 7507 BAU15S LED Bulbs Amber Yellow Built in Resistor CANBUS Error Free Anti Hyper Flash PY21W Bulb 600% Super Bright Turn Signal Light Need Resistors for Some Trucks**Auxbeam**$36.52**432 rev7mo ago](https://www.amazon.com/dp/B0G25MYDLW) [**AUTOONE White 1156 LED Light Bulbs 700% Super Bright & 6500K White 7506 BA15S P21W LED Bulbs for Backup Reverse Signal Blinker Tail DRL Brake Running Parking Lights 2PCS**AUTOONE**$15.13**5,697 rev8mo ago](https://www.amazon.com/dp/B0FP2F53YN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AUXITO CANBUS 7507 BAU15S LED Bulbs Amber Yellow with Built-in Resistor PY21W 12496 2641A 1156(150) Anti Hyper Flash Error Free Front Rear Turn Signal Lights and Blinker Parking Lights Pack of 2**AUXITO**$36.14**4.5★**▲ 294%**](https://www.amazon.com/dp/B0GS54YR8S) [**Auxbeam 2026 B2 Series BAU15S LED Bulb Amber Soft Light Long Life 400% Brighter 7507 PY21W Bulbs for Turn Signal Blinker DRL Parking Lights (Need Resistors for Brake or Turn Signal Light Use)**Auxbeam**$16.83**4.6★**▲ 293%**](https://www.amazon.com/dp/B0GQZ1KCHL) [**Flosser Incandescent BAU15s PY21W 7507 21W 667101 Amber Turn Signal Light Bulbs Replacement Lamp (Pack of 2) Made in Germany**FL�SSER**$9.97**4.7★**▲ 139%**](https://www.amazon.com/dp/B08GSR3X9K) [**Zikefest 10PCS 1157 Bulb Tail High and Low Brake Light Bulb P21/5W S25 2057 2357 7528 BAY15D Light Bulb Turn Signal Light Bulb Replacement Universal Halogen Brake Tail Light Parking Light (Amber)**Zikefest**$7.41**4.5★**▲ 133%**](https://www.amazon.com/dp/B0DXBRHH91) [**Flosser Incandescent BAU15s PY21W 7507 21W 9667101 Amber Turn Signal Light Bulbs Replacement Lamp (Pack of 2) Made in Germany**FL�SSER**$10.00**5.0★**▲ 105%**](https://www.amazon.com/dp/B0F647LXKG)
**~~View all trending →~~**
## **What buyers say about py21w bulb**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Brightness/Shine/Glow**41%
*“Extremely Bright”*
**Size-Overall**17%
*“fitment was good with a snug fit in the sockets”*
**Quality-Overall**10%
*“They seem to be well constructed”*
**Value For Money**10%
*“Your money well worth”*
**Advertised Vs Actual Product**5%
*“as advertised”*
**Assembly/Installation**4%
*“Easy install”*
**Efficiency**3%
*“Worked perfectly”*
**Color**2%
*“Color is great”*
**Durability**2%
*“Durability has been built into the design”*
**Ease Of Use**1%
*“easy to use”*
### **What buyers complain about **
**Size-Overall**15%
*“Didn't fit the car model, as advertised”*
**Durability**13%
*“Didnt last”*
**Quality-Overall**13%
*“Cheap Bulbs”*
**Compatibility-Overall**11%
*“Wrong DO NOT FIT 2014 Jeep Grand Cherokee”*
**Value For Money**10%
*“These are not worth the money”*
**Advertised Vs Actual Product**6%
*“Didn't fit the car model, as advertised”*
**Color**4%
*“personaly I dont like the yellow so wont use em”*
**Brightness/Shine/Glow**4%
*“they dont shine any brighter”*
**Paint Quality**4%
*“they are just painted on”*
**Functionality-Overall**4%
*“DRL does not work”*
### **Top return reasons **
**Size-Overall**49%
**Compatibility-Overall**23%
**Advertised Vs Actual Product**5%
**Functionality-Overall**5%
**Socket/Port/Plug**3%
**Brightness/Shine/Glow**3%
**Defective Material/Parts**3%
**Value For Money**2%
**Assembly/Installation**2%
**Color**2%
## **Common questions**
- **Is py21w bulb profitable to sell on Amazon United States?**
- The niche generates $57K/yr across 28 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is -11.0%. Flapen's verdict: Skip it (45/100).
- **How competitive is the py21w bulb niche?**
- 20 brands and 51 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 62% of demand.
- **What do buyers complain about in py21w bulb?**
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 5.6% — above our launch gate.
- **What does it cost to enter the py21w bulb niche?**
- Listings span $7.13–$52.53; the average listing price is $17.35 (sweet spot $15–$100). The average incumbent carries 3,248 reviews — the moat a new listing must climb.
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