“G4” refers to the bi‑pin base with 4 mm between the pins. These compact T3 capsule bulbs are often low‑voltage (commonly 12V AC/DC) and fit small fixtures like under‑cabinet puck lights, landscape lights, chandeliers, and some RV or appliance lights.

• Available as halogen or LED G4.
• Match the fixture’s voltage (12V vs. 120V), pin type, and capsule size for fit.
• Color options range from warm white (around 2700K) to cool/daylight.

On Walmart.com, you can filter by base type “G4,” voltage, lumen output, and color temperature to find a bulb that fits your fixture and the look you want.

Availability can vary by region, fixture needs, and evolving energy‑efficiency guidelines. You’ll find halogen G4 bulbs alongside G4 LED options, and many shoppers consider LED for lower energy use and longer service life.

• Verify your fixture’s requirements (voltage, size, dimming) before choosing.
• Use Walmart.com filters to compare halogen and LED G4 options by lumens and color temperature.
• If local rules affect bulb types, LED G4 models are widely offered in similar sizes and tones.

Selection can change over time. Reviewing product specs and customer Q&A can help you pick a compatible, efficient replacement for your setup.

For a softer, wind‑down feel, many people prefer warmer, lower‑output G4 LED bulbs.

• Color temperature: Warm white around 2700K–3000K tends to create a cozy ambiance compared with cool/daylight tones.
• Brightness: Lower lumens can feel gentler in bedrooms and living areas; check the lumen rating.
• Dimming: Pair dimmable LEDs with compatible dimmers to fine‑tune light levels.
• Placement: Indirect or shaded fixtures can help reduce glare.

Preferences vary by room and taste. Checking color temperature and lumens on each product page can help you dial in the atmosphere you want. For questions related to sleep or health, consider consulting a qualified professional.

Switching to a G4 LED can be simple, and a few checks may help the changeover go smoothly.

1. Match voltage: Many G4 fixtures use 12V (AC/DC). Choose an LED that matches your fixture (12V or 120V).
2. Confirm fit: G4 = 4 mm pin spacing; verify capsule length/diameter clearance.
3. Power supply: Some electronic transformers/dimmers need a minimum load. An LED‑compatible driver can reduce flicker.
4. Dimming: Use dimmable LEDs with compatible dimmers if you plan to dim.
5. Install safely: Turn off power, insert the bi‑pins fully, and test.

Results can vary by fixture design. If flicker or humming occurs, checking the driver or using an LED‑rated power supply can help.

A 2W G4 LED often delivers about 200–250 lumens, similar to many 20W halogen G4 bulbs (commonly around 200–280 lumens). Output can vary by design and color temperature.

• Accent/glow: ~110–200 lumens (some 1.5W LEDs).
• General small‑fixture tasks: ~200–300 lumens (around 2W).
• Brighter tasks: ~300–350 lumens (some 3W LEDs).

Comparing lumens, not watts, is the most reliable way to gauge brightness. Use Walmart.com filters to sort G4 LED bulbs by lumens and color temperature to find the level that fits your space and fixture.