LED Retrofit GU5.3 / MR16 – 12 V low-voltage spotGU5.3 (also GX5.3) is the pin socket for 12 V MR16 halogen spots – the most common low-voltage spot socket in recessed downlights, track lights and furniture lights. LED retrofit lamps GU5.3 save up to 85% energy compared to halogen MR16 (20–50 W). Technical details: MR16 shape (multi-facet reflector, 50 mm diameter), operating voltage 12 V AC or DC. LED wattages: 3 W (250 lm, 25 W equivalent), 5 W (450 lm, 35 W equivalent), 6.5 W (600 lm, 50 W equivalent), 8 W (700 lm, 65 W equivalent). Beam angles 24°, 36° and 60°. Colour rendering Ra > 80 standard, Ra > 90 for accent lighting. Transformer compatibility: electronic low-voltage transformers (ET) are generally LED-compatible, provided the minimum load is not undercut. Conventional iron-core transformers (magnetic) often require minimum loads of 20–40 W – when converting to LED, flickering, flicker or shutdown problems may occur. In these cases, we recommend replacing the transformer with an LED-compatible constant-voltage driver (12 V DC). Applications: retail spot lighting, museums and galleries, hotel accent lighting, display case lighting, kitchen recessed downlights, living room lights, track lighting. For homogeneous light images in retail installations: models with SDCM < 3 (very good colour consistency) on request. 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 GX5,3/GU5,3/MR16
LED Retrofit GX5,3/GU5,3/MR16 from lieske elektronik
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Lieske elektronik LED-1638-WW LED lamp base GU5.3 Warm White 38 LEDs
Color: warm white Color temperature (k): 3300 Consumption (W): 1.8 Brightness / distance 50cm (LUX) Max. 750 Socket: GU5.3 / MR16 LED: 38 Voltage (V): 12 VAC / No use of electronic transformers ... Lieske Part No.: 656611 Mfg Part No: LED-1638-WW |
5,49 EUR 5,49 EUR
 ≈ £4.71 | ≈ $6.31
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LED Retrofit GX5,3/GU5,3/MR16 from McShine
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LED Spotlight McShine'' Sesenta Vela 12,2 cm ( 4,8 inch ) MR16, 12V, 60 LEDs 250Lm, daylight / neutral white
60x 4.8mm LEDs - Beam angle: 60 degrees - ØxL 50x53 mm - GU5.3 - up to 50,000 hours lifetime! - Power Consumption 3 W - 250 lumens brightness - Energy efficiency class A - 4000 K color temperature - ... Lieske Part No.: 214369 Mfg Part No: 1450627 |
11,68 EUR
≈ £10.02 | ≈ $13.42
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LED Retrofit GX5,3/GU5,3/MR16 from Synergy 21
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 Synergy 21 LED Socket GX5, 3 and G4
Socket for LED Bulbs GX5, 3 and G4 cable length 20cm white fiberglass Constitution: Diameter 17mm, height 10mmLieske Part No.: 145872 Mfg Part No: S21-LED-000337 |
0,73 EUR
≈ £0.63 | ≈ $0.84
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 LED Retrofit GX5, 3 9 SMD 2835 ww
Socket GX5, 3, 9, size 2835 SMD LEDs in the lamp operating voltage: 12VHelligkeit: 350lm, 4 Watts Kelvin: 3000KAbstrahlwinkel 60 ° Plastic Cup weiß50mm x 58.5 mmAchtung: Please use with the Synergy ... Lieske Part No.: 624137 Mfg Part No: S21-LED-000591 |
0,49 EUR 0,49 EUR
≈ £0.42 | ≈ $0.56
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Synergy 21 LED Retrofit GX5, 3 4x1W infrared IR SECURITY LINE
Socket GX5, 34x LIGHT 1W LED diodes LampeALU case operating voltage 6-17V Power consumption: 4 W850nmAbstrahlwinkel 60 ° WxL: 50mm * 50mmPassen in conventional halogen socket Attention: Please use it ... Lieske Part No.: 623967 Mfg Part No: S21-LED-TOM00022 |
6,46 EUR
≈ £5.54 | ≈ $7.42
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 S21-LED-TOM00925 LED Retrofit GX5, 3 4x1W cw 440LM
Synergy 21 LED Retrofit GX5, 3 4x1W cw 440LM Socket GX5.3 4x BRIGHT 1W LED diode lamp ALU-housing Operating voltage 10-14V Power consumption: 4 W Lumen: 440LM Kelvin 5000 viewing angle 60 ° Note: ... Lieske Part No.: 758764 Mfg Part No: S21-LED-TOM00925 |
4,84 EUR
≈ £4.15 | ≈ $5.56
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 S21-LED-TOM00926 LED Retrofit GX5, 3 4x1W northwest 440LM
Synergy 21 LED Retrofit GX5, 3 4x1W northwest 440LM Socket GX5.3 4x BRIGHT 1W LED diode lamp ALU-housing Operating voltage 10-14V Power consumption: 4 W Lumen: 440LM Kelvin: 4200-4700K Beam Angle 60 ... Lieske Part No.: 758759 Mfg Part No: S21-LED-TOM00926 |
6,46 EUR
≈ £5.54 | ≈ $7.42
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 S21-LED-TOM00927 LED Retrofit GX5, 3 4x1W ww, 400Lm
Synergy 21 LED Retrofit GX5, 3 4x1W ww, 400Lm Socket GX5.3 4x BRIGHT 1W LED lamp, Aluminum casing Lumen: 400lm Kelvin 2850 to 3000 Operating voltage 10-14V Power consumption: 4 W Beam angle 60 ° DxH: ... Lieske Part No.: 758755 Mfg Part No: S21-LED-TOM00927 |
6,46 EUR
≈ £5.54 | ≈ $7.42
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 S21-LED-TOM00930 LED Retrofit GX5, 3 4x1W ww 440LM V2 - 24V version
Synergy 21 LED Retrofit GX5, 3 4x1W ww 440LM V2 - 24V version Socket GX5.3 4x BRIGHT 1W LED diode lamp ALU-housing Operating voltage 24V Power consumption: 4 W Lumen: 440LM Kelvin 2850-3000 angle 60 ... Lieske Part No.: 674839 Mfg Part No: S21-LED-TOM00930 |
8,89 EUR
≈ £7.63 | ≈ $10.21
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 LED retrofit GX5.3 4x1W UV
Socket GX5,34x BRIGHT 1W LED diodes LampeALU-Housing Supply 6-17V Power consumption: 4 W850nmAbstrahlwinkel 60 ° DxH: 50mm * 50mmPassen in conventional halogen version Caution: Please use at the ... Lieske Part No.: 326677 Mfg Part No: S21-LED-TOM00979 |
8,08 EUR
≈ £6.93 | ≈ $9.28
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 LED retrofit GU10 4x1W UV
Socket GU104x BRIGHT 1W LED diodes LampeALU-Housing Supply 230VLeistungsaufnahme: 4W450nmAbstrahlwinkel 60 ° DxH: 50mm * 50mmPassen in conventional halogen version Please note that Synergy21 LED ... Lieske Part No.: 326645 Mfg Part No: S21-LED-TOM00980 |
8,08 EUR
≈ £6.93 | ≈ $9.28
Delivery time from supplier's stock (ca.) 4 workdaysinfo_outline
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Synergy 21 LED retrofit GX5.3 4x1W super-ww
Socket GX5,34x BRIGHT 1W LED lamp, Aluminum casing Lumen: 400-440lmKelvin 2500-2700Betriebsspannung 10-14V Power consumption: 4 WAbstrahlwinkel 60 ° DxH: 50mm * 52mmDimmbar: Phase angle / phase ... Lieske Part No.: 754348 Mfg Part No: S21-LED-TOM01027 |
3,83 EUR 3,83 EUR
≈ £3.28 | ≈ $4.40
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FAQ
Why do my LED MR16 lamps flicker after conversion?
The existing transformer is not LED-compatible. Causes: minimum load undercut (electronic transformer needs e.g. 20 W, LEDs only deliver 12 W) or iron-core transformer not compatible. Solution: replace with LED driver 12 V DC.
Can I operate GU5.3 LEDs with any 12 V transformer?
No. Electronic transformers: check whether LED-approved and whether minimum load is met. Magnetic iron-core transformers: mostly not compatible with LED – replacement recommended.
Which beam angle is optimal for display case lighting?
24° for targeted illumination of individual exhibits. 36° for wider coverage. Combining 24° and 36° creates an even, high-contrast display case effect.
Are dimmable MR16 LEDs available?
Yes – for 12 V LED dimmer systems (DALI, 0–10 V or PWM). Note: standard GU5.3 LEDs are not dimmable. Order dimmable version and matching driver together.
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