# LED bulb Synergy21 78478 — G4 base, 3 W, 240 lm, Cool white 6000 K, 35000 h lifetime

**URL:** https://aio.lv/en/product--synergy21-s21-led-tom00154--12099388
**Data updated:** 2026-03-20 09:52 (EET)
**Category:** LED Bulbs
**Manufacturer:** Synergy21
**Manufacturer code:** S21-LED-TOM00154
**EAN:** 4038816992086
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Synergy21 78478 is a G4-base LED bulb with 3 W power and 240 lm luminous flux, producing cool white light at 6000 K. Designed for fixtures requiring a G4 fitting, it offers an estimated lifetime of 35,000 hours and a wide beam angle up to 120°. Suitable for accent, display, and small decorative luminaires where compact, energy-efficient lighting is needed.

## Long description

Synergy21 78478 is a compact G4-base LED bulb that delivers 240 lumens from a 3 W rating, producing a cool white light at 6000 K. With an estimated lifetime of 35,000 hours and a beam angle up to 120°, this lamp is designed for fixtures that require a small, energy-efficient light source while maintaining a high luminous output for accent, display, and decorative applications.
Advantages
The bulb combines low power consumption with a relatively high luminous flux, providing efficient illumination in small luminaires. Its long rated lifetime reduces the need for frequent replacements, and the cool white 6000 K output offers clear, neutral-to-cool colour rendering suitable for highlighting details. The wide beam angle helps distribute light evenly from compact fittings.
Suitable for
 Accent lighting in cabinets and display cases
 Small decorative fixtures and pendants with a G4 socket
 Task illumination for worktops, craft areas, or reading lamps with small housings
 Architectural detailing and cove lighting where compact bulbs are required
Key specifications
 Socket type: G4
 Power consumption: 3 W
 Luminous flux: 240 lm
 Colour temperature: 6000 K (cool white)
 Rated lifetime: 35,000 hours
 Beam angle: up to 120°
How to use
Ensure the luminaire is compatible with a G4 socket and that the fixture’s maximum supported wattage and electrical specifications match the bulb. Switch off power to the fixture before removing any existing lamp and insert the G4 pins gently into the socket until secure. Restore power and verify correct operation. For enclosed fixtures, confirm adequate heat dissipation according to the fixture manufacturer’s instructions.
Usage recommendations
Use this cool white 6000 K LED bulb where clear, focused illumination is desired; it is not intended for colour-critical applications requiring warm tones. To maximise lifetime and performance, avoid frequent rapid on/off switching and install in fixtures with suitable ventilation. Dispose of the bulb according to local electronic waste regulations.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Fitting/cap type | G4 |
| Bulb power | 3 W |
| Luminous flux | 240 lm |
| Light colour | Cool white |
| Colour temperature | 6000 K |
| Beam angle (max) | 120 ° |
| Bulb lifetime | 35000 h |

### Power

| Feature | Value |
|---|---|
| Input voltage | 12 |

### Technical details

| Feature | Value |
|---|---|
| LED type | SMD5050 |
| Mean cycles between failures (MCBF) | 50000 |
| Number of LEDs | 15 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.01 kg |
| Diameter | 45 mm |

### Other features

| Feature | Value |
|---|---|
| Energy efficiency class (old) | A+ |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Synergy21 products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Synergy21 service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: fitting/cap type, bulb power, luminous flux, colour temperature, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for LED bulb Synergy21 78478 — G4, 3 W, 6000 K?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12099388/67638951_large.webp