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G13
socket
600–1500 mm
length
9–22 W
LED
50% savings
vs. T8

LED Retrofit T8 (G13) – fluorescent tube replacement

LED tubes T8 with G13 socket replace T8 fluorescent tubes (18–58 W) directly in existing luminaires. They offer 50% less energy consumption, up to 50,000 h service life and flicker-free light without warm-up time – the most efficient way to modernise existing office, workshop and warehouse lighting.

Lengths and wattages: 600 mm / 9 W (800 lm, replaces 18 W T8), 900 mm / 14 W (1200 lm, replaces 30 W T8), 1200 mm / 18 W (1600 lm, replaces 36 W T8), 1500 mm / 22 W (2000 lm, replaces 58 W T8). Conversion methods: Retrofit (compatible with existing magnetic/electronic ballast + starter), Bypass ballast (bridge ballast, direct 230 V), Direct wiring. Colour temperatures: 3000 K, 4000 K, 6500 K.

Incandescent vs. LED – Lumen Comparison at a Glance Incandescent 25 W 40 W 60 W 75 W 100 W Lumens 250 lm 470 lm 806 lm 1055 lm 1521 lm LED ≈ 3 W ≈ 5 W ≈ 8 W ≈ 11 W ≈ 15 W Savings − 88 % − 87 % − 87 % − 85 % − 85 % Lifetime 1,000 h 1,000 h 1,000 h vs. 25,000+ h LED 25–50,000 h

Retrofit vs. bypass: retrofit tubes are the simplest solution (replace starter, change tube). Bypass tubes require a one-time electrical installation but deliver higher efficiency (no losses from ballast). For new builds and renovations: direct LED batten lights without T8 tubes recommended.

Applications: offices, warehouses, workshops, schools, supermarkets, hospitals, production halls. For large projects (complete building or hall conversion): project quote with payback calculation on request – typical payback period 2–4 years.

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

Order by:

LED Retrofit T8 from Goobay

Goobay 54555 LED starter - for LED tube T8 Goobay 54555 LED starter - for LED tube T8 Goobay LED starter, jewelry packaging
suitable for tandem circuits
bayonet pin spacing 13 mm
Operating voltage: 100 - 240 V
Power supply: 100-240 V AC
Diameter: 21 mm
Length: 39.5 mm

Lieske Part No.: 729594
Mfg Part No: 54555
Type: LED Starter
1,05 EUR
Goobay 54555 plus VAT
Delivery time from supplier's stock (ca.) 12 workdaysinfo_outline

LED Retrofit T8 from Synergy 21

Synergy 21 LED Tube T8 Serie 120cm, IP20 Sockel Synergy 21 LogoSynergy 21 LED Tube T8 Serie 120cm, IP20 Sockel LED TUBE Sockel T8 120cm für einseitig gespeiste Röhren Höhe (o. Fassung): 3,5 cm Höhe (m. Fassung): 6 cm Breite: 4,5 cm T8 Sockel in 120cm Länge für LED Tubes, ohne Starter und ohne ...

Lieske Part No.: 291170
Mfg Part No: S21-LED-000501
5,84 EUR
Synergy 21 S21-LED-000501 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Series Acc 150cm, IP20 double-Sock Synergy 21 LogoSynergy 21 LED Tube T8 Series Acc 150cm, IP20 double-Sock T8 LED TUBE base height 150cm suitable for single end fed RöhrenFür 2 LED tubes (not amended): 3.5 cm Height (with version): 6 cmWidth: 4.5 cm (foot) 9cm (bracket) T8 base in 150cm length for LED ...

Lieske Part No.: 422464
Mfg Part No: S21-LED-000503
13,76 EUR
Synergy 21 S21-LED-000503 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Series Acc 150cm, IP20 socket Synergy 21 LogoSynergy 21 LED Tube T8 Series Acc 150cm, IP20 socket 150cm T8 LED Tube Socket for single end fed tube height (without socket): 3.5 cm Height (with version): 6 cmWidth: 4.5 cmT8 base 150cm in length for LED Tubes, without starter and ballast without

Lieske Part No.: 971854
Mfg Part No: S21-LED-000504
-27% 7,53 EUR 10,26 EUR
Synergy 21 S21-LED-000504 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 series 120cm, IP20 double-pedestal Synergy 21 LogoSynergy 21 LED Tube T8 series 120cm, IP20 double-pedestal LED TUBE T8 120cm base for single end fed tubes suitable for 2 LED Tubes height (o version.): 3.5 cm height (m version.): 6 cm Width: 4.5 cm (foot) 9cm (holder) T8 base in 120cm length for LED Tubes, ...

Lieske Part No.: 129700
Mfg Part No: S21-LED-000802
6,60 EUR
Synergy 21 S21-LED-000802 plus VAT
Delivery time on requestinfo_outline
Synergy 21 LED Tube T8 Serie 1X0cm, IP55 Sockel Montageklammer Synergy 21 LogoSynergy 21 LED Tube T8 Serie 1X0cm, IP55 Sockel Montageklammer Montageklammer für IP55 Sockel auch für Doppelsockel und V2 Für 120cm und 150cm geeignet 2 Stück

Lieske Part No.: 1384697
Mfg Part No: S21-LED-00240170
1,27 EUR
Synergy 21 S21-LED-00240170 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 1X0cm, IP55 Sockel Deckelklammer Synergy 21 LogoSynergy 21 LED Tube T8 Serie 1X0cm, IP55 Sockel Deckelklammer Montageklammer für IP55 Sockel auch für Doppelsockel und V2 Für 120cm und 150cm geeignet 2 Stück

Lieske Part No.: 1384698
Mfg Part No: S21-LED-00240171
1,27 EUR
Synergy 21 S21-LED-00240171 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 1X0cm, IP55 Sockel PG Verschraubung Synergy 21 LogoSynergy 21 LED Tube T8 Serie 1X0cm, IP55 Sockel PG Verschraubung PG Verschraubung für IP55 Sockel Acuh für Doppel Sockel und V2 Für 120cm und 150cm geeignet 1 Stück

Lieske Part No.: 1384699
Mfg Part No: S21-LED-00240172
1,27 EUR
Synergy 21 S21-LED-00240172 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 120cm, IP55 Doppel-Sockel V2 Synergy 21 LogoSynergy 21 LED Tube T8 Serie 120cm, IP55 Doppel-Sockel V2 LED TUBE Sockel T8 120cm für einseitig gespeiste Röhren  (Wannenleuchte) Für 2 LED Röhren geeignet Schutzklasse IP55, PC Cover T8 Sockel in 120cm Länge für LED Tubes, ohne Starter und ohne ...

Lieske Part No.: 1066888
Mfg Part No: S21-LED-0240161
16,59 EUR
Synergy 21 S21-LED-0240161 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 150cm, IP55 Doppel-Sockel V2 Synergy 21 LogoSynergy 21 LED Tube T8 Serie 150cm, IP55 Doppel-Sockel V2 LED TUBE Sockel T8 150cm für einseitig gespeiste Röhren (Wannenleuchte) Für 2 LED Röhren geeignet Schutzklasse IP55, PC Cover T8 Sockel in 150cm Länge für LED Tubes, ???????ohne Starter und ohne ...

Lieske Part No.: 1066889
Mfg Part No: S21-LED-0240162
21,81 EUR
Synergy 21 S21-LED-0240162 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 120cm, IP55 Sockel V2 Synergy 21 LogoSynergy 21 LED Tube T8 Serie 120cm, IP55 Sockel V2 LED TUBE Sockel T8 120cm für einseitig gespeiste Röhren (Wannenleuchte) Schutzklasse IP55, PC Cover T8 Sockel in 120cm Länge für LED Tubes, ohne Starter und ohne Vorschaltgerät Größe: ...

Lieske Part No.: 1066890
Mfg Part No: S21-LED-0240163
13,21 EUR
Synergy 21 S21-LED-0240163 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 150cm, IP55 Sockel V2 Synergy 21 LogoSynergy 21 LED Tube T8 Serie 150cm, IP55 Sockel V2 LED TUBE Sockel T8 150cm für einseitig gespeiste Röhren (Wannenleuchte) Schutzklasse IP55, PC Cover T8 Sockel in 150cm Länge für LED Tubes, ohne Starter und ohne Vorschaltgerät Größe: 1562*35*35MM

Lieske Part No.: 1066891
Mfg Part No: S21-LED-0240164
18,12 EUR
Synergy 21 S21-LED-0240164 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 replacement starter Synergy 21 LogoSynergy 21 LED Tube T8 replacement starter Replacement starter for the LED Tubes

Lieske Part No.: 535232
Mfg Part No: S21-LED-G00032
-26% 2,51 EUR 3,41 EUR
Synergy 21 S21-LED-G00032 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 SL series 1047mm, 18W neutral white Synergy 21 LogoSynergy 21 LED Tube T8 SL series 1047mm, 18W neutral white LED tube (tube) fed on one side, base cannot be rotated
Recording: 18 watts Lumen: 2400 Lm, 130Lm/W Input: 100-240VAC, 50/60HZ Light color: neutral white Kelvin: 4000K±250 CRI: >80 Beam angle: ...

Lieske Part No.: 1788750
Mfg Part No: S21-LED-SL1047201
11,78 EUR
Synergy 21 S21-LED-SL1047201 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 150cm NW, 200LM/W, 16W/24W switchable Synergy 21 LogoSynergy 21 LED Tube T8 150cm NW, 200LM/W, 16W/24W switchable LED tube (tube)
fed on one side
Consumption: 16 and 24 watts
Lumen: 200lm/W, 3200/4800 Lm
Input: 100-240VAC, 50/60HZ
Light color: neutral white
Kelvin: 4000K±250
CRI: >80
Beam angle: 140°
Length: ...

Lieske Part No.: 115645
Mfg Part No: S21-LED-SL240005
18,64 EUR
Synergy 21 S21-LED-SL240005 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 150cm KW, 200LM/W, 16W/24W switchable Synergy 21 LogoSynergy 21 LED Tube T8 150cm KW, 200LM/W, 16W/24W switchable LED tube (tube)
fed on one side
Consumption: 16 and 24 watts
Lumen: 200lm/W, 3200/4800 Lm
Input: 100-240VAC, 50/60HZ
Light color: cold white
Kelvin: 6000K±250
CRI: >80
Beam angle: 140°
Length: ...

Lieske Part No.: 1156450
Mfg Part No: S21-LED-SL240006
18,64 EUR
Synergy 21 S21-LED-SL240006 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 120cm KW, 200LM/W, 10W/15W switchable Synergy 21 LogoSynergy 21 LED Tube T8 120cm KW, 200LM/W, 10W/15W switchable LED tube (tube)
fed on one side
Consumption: 10 and 15 watts
Lumen: 200lm/W, 2000/3500 Lm
Input: 100-240VAC, 50/60HZ
Light color: cold white
Kelvin: 6000K±250
CRI: >80
Beam angle: 140°
Length: ...

Lieske Part No.: 1156451
Mfg Part No: S21-LED-SL240007
15,65 EUR
Synergy 21 S21-LED-SL240007 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 120cm NW, 200LM/W 10W/15W switchable Synergy 21 LogoSynergy 21 LED Tube T8 120cm NW, 200LM/W 10W/15W switchable LED tube (tube)
fed on one side
Consumption: 10 and 15 watts
Lumen: 200lm/W, 2000/3500 Lm
Input: 100-240VAC, 50/60HZ
Light color: neutral white
Kelvin: 4000K±250
CRI: >80
Beam angle: 140°
Length: ...

Lieske Part No.: 1156452
Mfg Part No: S21-LED-SL240008
15,65 EUR
Synergy 21 S21-LED-SL240008 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 series 120cm, IP65 double base Synergy 21 LogoSynergy 21 LED Tube T8 series 120cm, IP65 double base LED TUBE socket T8 120cm for tubes fed on one side (tub light)
Protection class IP65
Dimensions 1270x110x72mm
Material: PC
clips made of metal, 10 pieces
incl. cabling for tubes fed on one side ...

Lieske Part No.: 1124899
Mfg Part No: S21-LED-T00004
12,89 EUR
Synergy 21 S21-LED-T00004 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Series 150cm, IP65 Base Synergy 21 LogoSynergy 21 LED Tube T8 Series 150cm, IP65 Base LED TUBE socket T8 150cm for single-sided fed tubes Protection class IP65 Dimensions 1565x70x75mm Material: PC Clips made of metal, 12 pieces incl. wiring for single-sided fed tubes without starter ...

Lieske Part No.: 1124898
Mfg Part No: S21-LED-T00005
13,21 EUR
Synergy 21 S21-LED-T00005 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
Synergy 21 LED Tube T8 Serie 150cm, IP65 Doppel-Sockel Synergy 21 LogoSynergy 21 LED Tube T8 Serie 150cm, IP65 Doppel-Sockel LED TUBE Sockel T8 150cm für einseitig gespeiste Röhren Schutzklasse IP65 Maße 1570x110x72mm Material: PC Clips aus Metal, 12 Stück incl. Verkabelung für einseitig gespeiste Röhren ohne Starter ...

Lieske Part No.: 291338
Mfg Part No: S21-LED-T0006
17,43 EUR
Synergy 21 S21-LED-T0006 plus VAT
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline

FAQ

Retrofit or bypass – which conversion method is better?
Retrofit: low effort, immediate replacement. Bypass: higher efficiency (no ballast losses), longer system life. For individual office replacements: retrofit. For complete hall conversion: bypass.

Can I operate T8 LED tubes with any ballast?
Retrofit tubes: compatible with most electronic and magnetic ballasts. But check the manufacturer's compatibility list – not every ballast is approved for LED retrofit.

How much do I save through T8 LED conversion?
Example: 100 luminaires with 2×36 W T8 = 7.2 kW. With LED 2×18 W: 3.6 kW. At 10 h/day, 250 days/year, EUR 0.30/kWh: EUR 2,700 savings per year. Typical payback 2–3 years.

Do I need an electrician for T8 LED conversion?
Retrofit: replace starter + change tube – can be carried out by trained personnel. Bypass wiring: must be carried out by an approved electrician in accordance with VDE regulations.

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Advice on colour temperature, socket, dimmability and energy efficiency. Contact: 07666 / 88499-0 or sales@industry-electronics.com
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