Existing-fixture retrofit
LED fluorescent tube replacement matched to your fixture
Keep a serviceable fixture while choosing the correct LED lamp and electrical route.
- T5 and T8 model comparisons
- Actual dimensions before nominal length
- Wiring assessment for the existing circuit
- Sample fit and light evaluation
Retrofit planning
Start with the fixture you intend to keep
Identify the original circuit
Send the ballast label and holder photo with the old lamp wattage. Include any starter, emergency pack, or control device.
Evaluate useful light
Check the light at the work surface, the reflector condition, and the mounting position. Equal lamp wattage does not mean equal lighting performance.
Plan installation access
Group fixtures by circuit type and location. You can then plan isolation, conversion labels, and sample trials for each group instead of assuming every fixture is identical.

Retrofit engineering
Resolve the conversion before ordering lamps
Circuit-specific support
Our engineers can examine the fixture information you send and identify which electrical details need checking before a lamp is connected.
Photometric checks
Integrating-sphere measurements can check lamp output, CCT, and CRI. They describe the selected tube; they do not certify the retained fixture as a complete assembly.
Sample-to-order traceability
After the fit trial, record the cap, cover, wiring, and label for production to use on the order.
Long-tube protection
Our LED tube factory can discuss end supports and cartons for the chosen length to reduce avoidable lamp damage during shipment.
Replacement scope
What changes in an LED fluorescent tube replacement
Replacement candidates
Compare lamps against the existing fitting
Mainstream T8 retrofit
Slim T5 replacement
Retrofit handover
Keep the conversion identifiable

Holder engagement
The pins should seat securely in the existing holders. A fit trial lets you check for worn contacts or obstructions before converting more fixtures.

Conversion label
VST can discuss lamp labels and wiring identification as an LED tube vendor. The information should describe the ordered circuit, not the fixture’s former fluorescent connection.

Measured lamp data
Use the selected sample’s output and color measurements to judge the lighting. A catalog wattage cannot tell you how much useful light reaches the work surface.

Protected end caps
Packing supports keep the lamp pins from taking the load at the carton ends. Check the support arrangement against the tube length and the number packed together.
Lamp assembly
Lamp parts that matter in a retrofit

Light source
LED light source

Contact interface
End cap

Optical cover
PC diffuser
Production context
See the company behind the retrofit supply
Company introduction
Get to know VST through the company introduction. Bring the fixture details into the retrofit discussion so you can identify which parts will stay and the lamp and wiring arrangement you need.
Customer cooperation
The approved customer video adds a perspective on working with VST. Discuss the communication and support you need for the project, while checking lamp suitability through your fixture trial and the relevant lamp information.
Retrofit applications
Match replacement lamps to the lighting task

Existing office fittings

Classroom relamping

Retail aisle retrofits

Workshop fixture upgrades

Low-ceiling storage areas
Start the conversion assessment
Show us the lamp and fitting you have
Published replacement range
T5 and T8 data for your fixture comparison
| VST-T5-600-10W | 10W; D20 × 562mm |
|---|---|
| VST-T5-900-15W | 15W; D20 × 862mm |
| VST-T5-1200-18W | 18W; D20 × 1162mm |
| VST-T5-1200-22W | 22W; D20 × 1162mm |
| VST-T5-1500-25W | 25W; D20 × 1462mm |
| VST-T5-1500-30W | 30W; D20 × 1462mm |
| Input Voltage | AC85V-265V 50/60Hz |
| Luminous Efficiency | 150lm/W |
| Power Factor | >0.92 |
| Color Temperature | 2700K-7000K |
| CRI | > 80 |
| Beam Angle | 160° |
| LED Driver | Constant Current Internal |
| Material | Aluminum + PC |
| PC Type | Clear, Frost |
| Lamp Base | G5 |
| IP Rate | IP20 IP65 optional |
| Rated lifespan | 50,000hrs |
| Working Temperature | -20°C~+50°C |
| Work Humidity | 10%-90% RH |
| VST-T8-450-7W | 7W; D28 × 450mm |
|---|---|
| VST-T8-600-10W | 10W; D28 × 600mm |
| VST-T8-900-14W | 14W; D28 × 900mm |
| VST-T8-970-15W | 15W; D28 × 970mm |
| VST-T8-1200-18W | 18W; D28 × 1212mm |
| VST-T8-1500-22W | 22W; D28 × 1514mm |
| VST-T8-2400-36W | 36W; D28 × 2400mm |
| Input Voltage | AC85V-265V 50/60Hz |
| Luminous Efficiency | 150lm/W |
| Power Factor | >0.92 |
| Color Temperature | 2700K-7000K |
| CRI | > 80 |
| Beam Angle | 160° |
| LED Driver | Constant Current Internal |
| Material | Aluminum + PC |
| PC Type | Clear, Frost |
| Lamp Base | G13 or G5 |
| IP Rate | IP20 IP65 optional |
| Rated lifespan | 50,000hrs |
| Working Temperature | -20°C~+50°C |
| Work Humidity | 10%-90% RH |
Cooperation feedback
Support during the retrofit discussion
Replacement order
Ordering a fixture-matched replacement
Conversion decisions
Questions before converting existing fittings
| Compatible ballast route | Retains an expressly compatible ballast; depends on its condition and lamp list. |
|---|---|
| Direct-wire route | Changes the circuit; requires the exact lamp wiring and conversion labeling. |
| Electrical identity | Selected lamp input and supply arrangement. |
|---|---|
| Service instruction | Applicable lamp type and conversion warning. |
| Traceability | Model, order or batch reference, and installer record. |

