PHILIPS SX-4722 Courtesy Light Bulb M35H M37 Q50 Q70

( Brand: Philips ), ( Manufacturer Part Number: SX-4722 ), ( Placement On Vehicle: Electrical Lighting Body Lighting Interior ), ( Type: Courtesy Light Bulb ), ( Item Width: 2.760 ), ( Item Height: 0.510 ), ( Item Length: 3.860 ), ( Manufacturer Warranty: 3 Months / 1 Year / 2 Years Depending On Part ), ( Ipn: C309 68-23 ), ( Compatible Model: Fx35 Fx45 M35h M37 M56 Q50 Q70 Qx50 Qx80 ), ( Compatible Year: 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Philips Courtesy Light Bulb )

Review PHILIPS Courtesy Light Bulb Infiniti M37 Q50 Q70 Al fits FX35 FX45 M56 QX50

The **Philips SX4722 Courtesy Light Bulb** is a meticulously engineered, high-performance lighting solution specifically designed to illuminate the interior courtesy areas of luxury vehicles, including the **Infiniti FX35, FX45, M35h, M37, M56, Q50, Q70, QX50, and QX70** models. Engineered with Philips signature precision and reliability, this bulb delivers a crisp, bright white light (approximately **4,000K color temperature**) that enhances visibility while maintaining a sleek, modern aesthetic. Crafted with a **halogen filament**, it ensures immediate, full illumination upon activation, providing a warm yet functional glow that complements the vehicle s premium interior design. The bulb s **compact, bayonet-style (B15d) base** guarantees a secure and snug fit within the vehicle s courtesy light housing, minimizing the risk of loosening or misalignment over time. Built to withstand the demands of frequent use, this bulb is constructed from durable, high-quality materials that resist heat and mechanical stress, ensuring longevity and consistent performance even with regular activation. Whether illuminating the rear door pockets, trunk area, or under-dash storage compartments, the Philips SX4722 delivers a reliable, long-lasting light source that enhances both convenience and safety. Ideal for drivers who demand performance without compromise, this bulb is a seamless upgrade for any Infiniti owner seeking clarity, durability, and a touch of sophistication in their vehicle s interior lighting.

### **Pros and Cons of buying a Philips SX4722 Courtesy Light Bulb for Infiniti Models (FX35, FX45, M35H, M37, M56, Q50, Q70, QX50, AL)**

1. **High Luminosity and Brightness** The Philips SX4722 is a **12V 10W halogen bulb** with a **bright white (2700K) output**, providing excellent visibility inside the vehicle. This is significantly brighter than standard incandescent bulbs, improving interior lighting for better visibility during nighttime or low-light conditions.

2. **Longer Lifespan Compared to Standard Halogens** While not as long-lasting as LEDs, Philips halogen bulbs typically last **2,000 to 3,000 hours**, which is an improvement over generic halogen bulbs that may fail sooner.

3. **Compatibility with Infiniti Models** The **SX4722** is a **standard courtesy light bulb** (often referred to as the dome/map/door jam light bulb) for many Infiniti vehicles, including the FX, M, Q, and QX series. It fits securely in the standard **BA15s (P21/5W) socket**, reducing the risk of improper installation.

4. **Affordable Upgrade** Compared to LED or smart bulb alternatives, the Philips SX4722 remains **cost-effective**, offering better performance without a significant price increase.

5. **No Additional Installation Complexity** Unlike LED bulbs that may require wiring modifications or adapters, this halogen bulb **plug-and-play** installation is straightforward, making it a hassle-free replacement.

6. **Warm White Lighting (2700K)** The **soft white light** reduces eye strain compared to harsh blue-tinted LEDs, providing a more natural and comfortable ambiance inside the cabin.

7. **Reliable Brand Reputation** Philips is a well-known manufacturer with a history of producing **durable automotive lighting solutions**, reducing the risk of early failure.

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1. **Still a Halogen Bulb (Not LED)** While brighter than standard halogens, it is **not as energy-efficient or long-lasting as LED alternatives**. LEDs can last **10,000 hours** and consume less power, though they may require a **resistor or LED-compatible socket** for proper function.

2. **Heat Generation** Halogen bulbs **produce more heat** than LEDs, which could potentially **damage plastic trim or wiring** over time if installed near sensitive components.

3. **No Smart Features** Unlike some modern LED bulbs, the Philips SX4722 **does not offer smart functionalities** (e.g., dimming, color-changing, or remote control), which some drivers may prefer for customization.

4. **Slightly Higher Power Consumption** At **10W**, it draws more power than LEDs, though the difference is minimal in most vehicles.

5. **Potential for Flickering in Some Vehicles** In rare cases, halogen bulbs may **flicker or dim** if the vehicle s electrical system has issues (e.g., loose connections, voltage fluctuations).

6. **Limited Availability of Aftermarket Alternatives** While widely available, some drivers may prefer **LED upgrades** for better longevity, but these require **additional components** (e.g., resistors) to function safely.

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The **Philips SX4722 is a solid, reliable choice** for replacing standard courtesy light bulbs in Infiniti vehicles. It offers **improved brightness, better visibility, and a longer lifespan than generic halogens** while maintaining **easy installation and affordability**. However, if **long-term durability and energy efficiency** are priorities, **LED alternatives** (with proper resistors) would be a better long-term investment though they require slightly more effort to install correctly.

For most drivers seeking a **simple, effective upgrade without complexity**, the Philips SX4722 is an **excellent balance of performance and convenience**.

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- **If you want a quick, no-fuss upgrade with better brightness than stock bulbs**, the **Philips SX4722 is the best choice**.

- **If you prefer long-term reliability and energy savings**, consider **LED courtesy bulbs** (e.g., Philips LED BA15s or equivalent) **with a current-limiting resistor** to ensure safe operation.

- **Always ensure proper installation** check your vehicle s wiring and socket type to avoid electrical issues.

For Infiniti owners, the **Philips SX4722 is a safe, well-tested option** that delivers noticeable improvements over standard bulbs.

Details:

Philips Courtesy Light Bulb for Infiniti FX35 FX45 M35h M37 M56 Q50 Q70 QX50 al: Status: In Stock.

part #: sx4722 prices

• $13.77-$20.48

specifications interiorlightsot:

• for models: Fx35, Fx45, M56, Qx50
• for makes: Infiniti
• brand: Philips
• mpn: Sx-4722
• placement on vehicle: Electrical Lighting Body Lighting Interior
• type: Courtesy Light Bulb
• item width: 2.760
• item height: 0.510
• item length: 3.860
• manufacturer warranty: 3 Months / 1 Year / 2 Years Depending On Part
• ipn: C309 68-23
• compatible model: Fx35 Fx45 M35h M37 M56 Q50 Q70 Qx50 Qx80
• compatible year: 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Philips Courtesy Light Bulb

general interiorlightsot:

• Car Truck Parts Accessories > Lighting Lamps > Interior Light Assemblies
• condition: New

offer interiorlightsot:

• options: Ship-to-home
• quantity: 2
• sold: 0
• availability: In Stock
• started: April 13, 2026

payments interiorlightsot:

• other
• credit card: Diners-club
• wallet: Apple-pay

shipping interiorlightsot:

• cost: $0.00
• transit: 2-5 Days
• class: Standard, Expedited
• type: Fixed
• service: Standard, Expedited

returns interiorlightsot:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

seller interiorlightsot:

• rating: 99.6%
• # reviews: 644330
• city: Indianapolis, Indiana

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