LED Retrofit G4LED retrofit lamps with G4 socket are the energy-efficient replacement for conventional halogen and fluorescent lamps in existing sockets – no modification, no electrician, with immediate payback through up to 85% lower energy consumption. Application area: for 12 V furniture lights, display case spots and recessed spotlights with G4 pin socket (4 mm pin spacing). These LED lamps operate with a service life of 15,000 to 50,000 operating hours, surpassing halogen equivalents by 10 to 25 times. Available colour temperatures: 2700 K warm white (atmosphere and restaurants), 3000 K warm white (office-warm), 4000 K neutral white (task lighting), 6500 K daylight white (detail work and laboratory). Colour rendering Ra > 80 standard; Ra > 90 on request. All lamps comply with the EU Ecodesign Directive and are CE-certified. For installation projects with larger quantities, we offer volume discounts and framework agreements. Please specify socket type, wattage, colour temperature and quantity when enquiring. Questions about socket, colour temperature or bulk orders? 07666 / 88499-0 or sales@industry-electronics.com |
Leading Manufacturers: ✓ Osram ✓ Philips ✓ Samsung LED ✓ Ushio ✓ Radium ✓ Sylvania ✓ Ledvance ✓ Megaman |
Top sellers in LED Retrofit G4
Synergy 21 LED Retrofit G4 15xSMD cool white
2,93 EUR
Synergy 21 LED Retrofit G4 15xSMD ww pins back
2,93 EUR
Synergy 21 LED Retrofit G4 10xSMD green
2,55 EUR
Synergy 21 LED Retrofit G4 10xSMD red
2,55 EUR
Synergy 21 LED Retrofit G4 10xSMD ww
2,55 EUR
Synergy 21 LED Retrofit G4 15xSMD warm white
2,93 EUR
Synergy 21 LED Retrofit G4 24x5050 SMD back pin ww
3,83 EUR
Synergy 21 LED Retrofit G4 24xSMD 5050 kw
3,83 EUR
LED Retrofit G4 from Synergy 21
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 Synergy 21 LED Retrofit E27 drop lamp G45 ww 1.5 watt for fairy lights
G45 E27 glass bulb clear in warm white with LED filament120° beam angle AC 230V/50-60Hz Light color: 3000K Lumen: 150 1.5 watt Height: 65mm (with base) Diameter: 45mm Please note that the Synergy21 ... Lieske Part No.: 1265431 Mfg Part No: S21-LED-001175 |
1,15 EUR
 plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit E27 drop lamp G45 ww 0.5 watt for fairy lights
G45 E27 glass bulb clear in warm white with LED filament 120° beam angle AC 230V/50-60Hz Light color: 3000K Lumen: 50lm 0.5 watt Height: 65mm (with base) Diameter: 45mm Please note that the Synergy21 ... Lieske Part No.: 1265603 Mfg Part No: S21-LED-001181 |
1,14 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Tube T8 SL Series 120cm, cold white high power
LED tube (tube) fed on one side Recording: 20 watts Lumen: 170lm/W, 3400 LM Input: 100-240VAC, 50/60HZ Light color: cold white Kelvin: 6100K ±250 CRI: >80 Beam angle: 140° Length: 1200 mm ... Lieske Part No.: 749516 Mfg Part No: S21-LED-BS00072 |
8,93 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 S21-LED-NB00075 LED Retrofit G4 3W Bullet ww
Synergy 21 LED Retrofit G4 3W Bullet ww Pins belowwarm white 3000K, 200LmViewing Angle: 360 °12-24 V AC / DC, 3WDimensions: 50mm x 20mmWorking temperature: -20 ~ 40 ° C Attention: Please Use with ... Lieske Part No.: 560249 Mfg Part No: S21-LED-NB00075 |
1,65 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Tube T8 SL series 90cm, warm white VDE
LED tube (tube) fed on one side Recording: 13 Watt Lumen: 130lm/W, 1900 Lm Input: 100-240VAC, 50/60HZ Light color: warm white Kelvin: 3000K±250 CRI: >80 Beam angle: 140° Length: 900 mm Diameter: ... Lieske Part No.: 424271 Mfg Part No: S21-LED-SL090300 |
9,60 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 24x 5050 SMD back pin ww
24x LED G4 SMD LED 5W-Backpin warm white color temperature: 3000-3500K Luminous Flux: 480 Lumens Beam Angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without PINS-length Pins: ... Lieske Part No.: 200303 Mfg Part No: S21-LED-TOM00069 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 ww
24x LED G4 SMD LED 5W-sidepin warm white color temperature: 3000-3500K Luminous Flux: 480 Lumens Beam Angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without PINSBitte note that the ... Lieske Part No.: 975832 Mfg Part No: S21-LED-TOM00070 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time on requestinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 kw pins back
24x LED G4 SMD LED 5W-Backpin cold white color temperature: 6000-6500K Luminous Flux: 500 Lumens Beam Angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without PINSBitte note that the ... Lieske Part No.: 514342 Mfg Part No: S21-LED-TOM00071 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 kw
24x LED G4 SMD LED 5W-sidepin cold white color temperature: 6000-6500K Luminous Flux: 500 Lumens Beam Angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without PINSBitte did note the ... Lieske Part No.: 409680 Mfg Part No: S21-LED-TOM00072 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time on requestinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 nw pins back
LED G4 24x SMD LED 5W cool white-Backpin-Color temperature: 4000-4300K ​​Luminous Flux: 490 Lumens Beam Angle: 120 ° - SMD 5050 - 12V DC Diameter 44mm, t = 8.5 mm without ... Lieske Part No.: 948449 Mfg Part No: S21-LED-TOM00085 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 nw
24x LED G4 SMD LED 5W-sidepin neutral white color temperature: 4000-4300K ​​Luminous Flux: 490 Lumens Beam Angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without ... Lieske Part No.: 551596 Mfg Part No: S21-LED-TOM00086 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 10x SMD kw
10x SMD LED G4 2.2W - pins side-cool white 6000K, 160Lm 12V AC / DC, 10-30V DC - 10x SMD5050 LED Dimensions: Ø 31,5 mm also suitable for over voltage (eg caravan, boat) - already from full brightness ... Lieske Part No.: 429381 Mfg Part No: S21-LED-TOM00145 |
-27% 2,55 EUR 3,47 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 15x SMD ww pins back
LED G4 15x SMD 3W - Pins rear-warm white 3300K, 210Lm 12V AC / DC, 8-30V DC - 15x SMD5050 LED Dimensions: Ø 45mm for overvoltage suitable (eg caravan, boat) - starting at 10V full brightness Please ... Lieske Part No.: 103965 Mfg Part No: S21-LED-TOM00152 |
-27% 2,93 EUR 4,00 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 15x SMD kw, rear pins
LED G4 15x SMD 3W - Pins rear-angle 120 ° - cool white 6000K, 240Lm 12V AC / DC, 8-30V DC - 15x SMD5050 LED Dimensions: Ø 45mm for overvoltage suitable (eg caravan, boat) - already from full ... Lieske Part No.: 359928 Mfg Part No: S21-LED-TOM00154 |
-27% 2,93 EUR 4,00 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 10x SMD pins back ww
10x SMD LED G4 2.2W - Pins rear-warm white 3300K, 140Lm 12V AC / DC, 10-30V DC - 10x SMD5050 LED Dimensions: Ø 31.5 mm therefore suitable for overvoltage (eg caravan, boat) - Already from full ... Lieske Part No.: 345076 Mfg Part No: S21-LED-TOM00156 |
-27% 2,55 EUR 3,47 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 10x SMD ww
10x SMD LED G4 2.2W - Pins-side warm white 3300K, 140Lm 12V AC / DC, 10-30V DC - 10x SMD5050 LED Dimensions: Ø 31,5 mm also suitable for over voltage (eg caravan, boat) - already from full brightness ... Lieske Part No.: 863457 Mfg Part No: S21-LED-TOM00161 |
-27% 2,55 EUR 3,47 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 6x SMD red
1.3 SMD5050 LED 12V AC / DC, 8-30VDC, LED G4 6x SMD W pins laterally-red-6x - Dimensions: 23mm-also Ø for overvoltage suitable (eg caravan, boat) - note already from 10V full brightness Please that ... Lieske Part No.: 653768 Mfg Part No: S21-LED-TOM00173 |
-27% 1,91 EUR 2,60 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 6x SMD green
1.3 LED G4 6x SMD W-pins side-green-6x SMD5050 LED 12V AC / DC, 8-30VDC, - Dimensions: Ø 23mm for overvoltage suitable (eg caravan, boat) - note Already from 10V full brightness Please did the ... Lieske Part No.: 234899 Mfg Part No: S21-LED-TOM00174 |
-27% 1,91 EUR 2,60 EUR
plus delivery charges
Delivery time on requestinfo_outline
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Synergy 21 LED Retrofit G4 10x SMD red
10x SMD LED G4 2.2W - pins laterally-red-12V AC / DC, 10-30V DC - 10x SMD5050 LED Dimensions: Ø 31,5 mm also suitable for over voltage (eg caravan, boat) - starting at 10V full Brightness Please note ... Lieske Part No.: 742264 Mfg Part No: S21-LED-TOM00177 |
-27% 2,55 EUR 3,47 EUR
plus delivery charges
Delivery time on requestinfo_outline
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Synergy 21 LED Retrofit G4 10x SMD green
10x SMD LED G4 2.2W - pins side-green-12V AC / DC, 10-30V DC - 10x SMD5050 LED Dimensions: Ø 31,5 mm also suitable for over voltage (eg caravan, boat) - starting at 10V full Brightness Please note ... Lieske Part No.: 213907 Mfg Part No: S21-LED-TOM00178 |
-27% 2,55 EUR 3,47 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 10x SMD blue
10x SMD LED G4 2.2W - pins side-blue-12V AC / DC, 10-30V DC - 10x SMD5050 LED Dimensions: Ø 31,5 mm also suitable for over voltage (eg caravan, boat) - starting at 10V full Brightness Please note ... Lieske Part No.: 636122 Mfg Part No: S21-LED-TOM00180 |
-27% 2,55 EUR 3,47 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 11 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 15x SMD amber
LED G4 15x SMD 3W - pins side-amber-12V AC / DC, 8-30V DC - 15x SMD5050 LED Dimensions: Ø 45mm for overvoltage suitable (eg caravan, boat) - starting at 10V full brightness Please note that the ... Lieske Part No.: 572244 Mfg Part No: S21-LED-TOM00183 |
-68% 1,27 EUR 4,00 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 red
24x LED G4 SMD LED 5W-sidepin cold white color temperature: red-Beam angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without PINSBitte did note the Synergy 21 LED Retrofit lamps only ... Lieske Part No.: 920623 Mfg Part No: S21-LED-TOM00185 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 11 workdaysinfo_outline
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Synergy 21 LED Retrofit G4 24x SMD 5050 green
24x LED G4 SMD LED 5W-sidepin cold white color temperature: green angle: 120 ° - SMD 5050 - 12V AC to DC Diameter 44mm, t = 8.5 mm without PINSBitte note that the Synergy 21 LED Retrofit lamps only ... Lieske Part No.: 521645 Mfg Part No: S21-LED-TOM00186 |
-27% 3,83 EUR 5,22 EUR
plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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FAQ
Which colour temperature is suitable for professional lighting with G4?
2700–3000 K for living and restaurant areas with warm ambience. 4000 K for office, workshop and retail. 6500 K for security, inspection and laboratory lighting where colour differentiation is important.
Are all LED retrofit lamps dimmable?
No – only models with explicit dimmer labelling. For dimmer installations, always choose the dimmable version and compatible dimmer type (trailing-edge preferred) together.
How long does an LED G4 lamp last in commercial operation?
At 8–10 h/day: 5–15 years, depending on quality level. L70 lifetime (still 70% initial luminance): 15,000–50,000 h. Industrial quality: 50,000 h recommended for hard-to-reach locations.
Can you offer bulk deliveries for installation projects?
Yes – volume discounts from 50 units, framework agreements for large projects. Enquiry with type, colour temperature, quantity and delivery date to sales@industry-electronics.com.
Why Industry-Electronics?
| ✓ B2B specialist since 1990 Lieske Elektronik supplies companies, authorities and institutions – personal expert advice instead of anonymous mass processing. |
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✓ Expert advice & fast delivery Advice on colour temperature, socket, dimmability and energy efficiency. Contact: 07666 / 88499-0 or sales@industry-electronics.com |