UV BLB fluorescent lamp for fluorescence effects | F4 T5 | 4W | 365 nm | AC 230V ±10% | straight glass | CFL | 8000 h | non-dimmable
Code: ES-F4BLBFluorescent lamp designed for fluorescence effects, decorative "black light" lighting, themed spaces, bars, stages, special effects, and highlighting UV markings. The BLB type lamp typically features a darker purple filter, emitting less visible light while better highlighting materials that react to UV light. The lamp operates on AC 230V ±10% voltage, has a power of 4W, a lifespan of 8000 hours, and is not dimmable.-
UV BLB Fluorescent Lamp for fluorescence effects – F4 T5, 4W, AC 230V, linear, 8000 hrs
UV BLB F4 T5 fluorescent lamp, designed for fluorescence effects, decorative „black light“ illumination, themed spaces, bars, stages, special effects, and highlighting UV markings. The BLB type lamp typically features a darker purple filter, which reduces visible light emission and better enhances materials that react to UV light. The lamp operates at AC 230V ±10% voltage, has 4W power, an 8000-hour lifespan, and is non-dimmable.
Key concept:
This BLB type UV fluorescent lamp is best suited for decorative „black light“ effects, highlighting fluorescent paints, stickers, decorations, markings, or special surfaces. This is a special-purpose lamp and is not intended for standard room or workplace lighting.Type
F4 T5 BLB UVPower
4WApplication
Fluorescence effectsLifespan
8000 hrsOperating principle
The BLB type UV fluorescent lamp emits UV light through a darker purple filter. As a result, the amount of visible light is typically lower, and fluorescent objects, paints, signs, or decorations can glow brighter and with more contrast.
The lamp works on the CFL / fluorescent principle, so it requires a compatible F4 T5 type fixture, proper contacts, and a starting circuit. Before installation, it is necessary to check that the fixture is suitable for this specific type of lamp.
How does a BLB lamp differ from a BL lamp?
The BLB lamp is more focused on effects – it is used when you want to highlight fluorescent materials, decorations, paints, or UV markings. Compared to a BL lamp, BLB is more often chosen for bars, stages, themed rooms, decorative effects, and „black light“ illumination.Technical parameters
Product type UV BLB fluorescent lamp Model / type F4 T5 BLB Primary application Fluorescence effects and decorative UV lighting Power 4W Lamp principle CFL / fluorescent lamp Construction Linear glass tubular lamp Shape Linear Input voltage AC 230V ±10% Light type BLB UV / black light blue Color rendering index CRI / Ra Ra 60 Luminous efficacy 60 lm/W Lifespan 8000 hrs Working hours Up to 10000 hrs Wavelength 365 nm Dimmable No Weight 0.05 kg Where is it used?
- For fluorescence effects – for paints, decorations, stickers, and surfaces that react to UV light.
- In bars, clubs, and KTV rooms – for decorative „black light“ effect.
- On stages and event spaces – for special violet UV lighting.
- For checking documents or markings – when you need to highlight UV-reactive signs.
- In themed rooms – for decorations, Halloween, gaming, or effect spaces.
Practical example of use
For example, an F4 T5 BLB 4W lamp is installed in a compatible small UV fixture used to highlight fluorescent decorative elements. Once the fixture is turned on, the UV-reactive surfaces start to glow, creating a „black light“ effect in the room.
Before use, it is essential to check if the fixture is adapted for an F4 T5 BLB type lamp, and that the contacts, length, power, and starting circuit match.
Pros
- BLB „black light“ effect – well suited for highlighting fluorescence.
- Suitable for decorative UV lighting – for bars, stages, clubs, and themed spaces.
- F4 T5 shape – compact linear lamp for special fixtures.
- 4W power – low-power solution for special effects.
- 8000 hrs lifespan – suitable for periodic use.
- Can help highlight UV markings – depending on material and environment.
- Low weight – approx. 0.05 kg.
Cons / limitations
- Non-dimmable – not suitable for light intensity adjustment with a dimmer.
- Requires compatible fixture – must verify F4 T5 type, contacts, and length.
- Not for main lighting – BLB light is intended for effects, not for illuminating working areas.
- Weaker visible light – due to the filter, the lamp may look darker than a BL type.
- Glass construction – must be protected from impact and bending.
Safety and usage notes
The BLB UV fluorescent lamp is a special-purpose light source, so it must be used responsibly and only with compatible fixtures.
- Always disconnect power before replacement and ensure the device is de-energized.
- Use only with a compatible fixture – must check F4 T5 type, length, contacts, and starting circuit.
- Do not use with a dimmer, as the lamp does not support dimming.
- Do not look directly at UV light for an extended time, especially from close range.
- Install glass lamp carefully – impact or pressure can damage it.
- In public spaces or around children, use only in a properly protected fixture to prevent direct contact with the lamp.
Quick selection guide
F4 T5 BLB UV 4W fluorescent lamp – a suitable choice when you need a „black light“ effect, to highlight fluorescent decorations, or for special UV illumination in a small fixture. Before purchasing, the most important thing is to check if your fixture supports the F4 T5 BLB lamp type, contacts, length, and starting circuit.
Type
F4 T5 BLBPower
4WApplication
For fluorescenceResource
8000 hrsSuitable when you need:- „black light“ effect;
- highlighting fluorescent paints or decorations;
- BLB type F4 T5 lamp;
- small 4W UV lamp for a special fixture;
- decorative UV lighting for a bar, stage, or themed space.
Check before use:- if the old lamp is marked as F4 T5 BLB;
- if contacts and length match;
- if AC 230V ±10% voltage suits your device;
- if the fixture has a compatible starting circuit;
- if you really need the BLB effect, rather than a BL lamp for an insect trap.
Important reminder:
The BLB lamp is usually chosen for fluorescence effects and decorative UV lighting. If the primary purpose is an insect trap, a BL version is often more suitable.FAQ – Frequently asked questions
What is this BLB lamp for?
This BLB lamp is designed for fluorescence effects, decorative „black light“ lighting, and highlighting UV markings or special surfaces.Is BLB suitable for an insect trap?
It can be used in some systems, but BL lamps are more commonly chosen for insect traps. You must check the requirements of your specific trap.What is the lamp power?
The lamp power is 4W.Is the lamp dimmable?
No, this lamp does not support dimming.Is this an LED lamp?
No. According to the provided data, this is a CFL / fluorescent lamp.Can it be used as main lighting?
No. This is a special-purpose UV / BLB lamp intended for effects, not for standard work or room lighting.BLB UV lamp for fluorescence effects and „black light“ illumination
The F4 T5 BLB 4W fluorescent lamp is a special-purpose light source designed to highlight fluorescent materials, for decorative UV lighting, and for „black light“ effects.
Thanks to its BLB type light, 4W power, AC 230V ±10% power supply, linear T5 shape, and 8000-hour lifespan, this lamp is suitable for stages, bars, themed rooms, special effects, and highlighting UV-reactive surfaces.
Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.The IP protection class indicates the device's resistance to environmental factors.

The first digit indicates protection against dust and solid objects.
The second digit indicates protection against moisture.First digit values:
X — Untested;
0 — No protection;
1 — Protected against solid objects larger than 50 mm;
2 — Protected against solid objects larger than 12.5 mm;
3 — Protected against solid objects larger than 1 mm;
4 — Protected against solid objects larger than 1 mm;
5 — Dust protected;
6 — Totally dustproof.
Second digit values:X — Untested;
0 — No protection;
1 — Protected against vertically falling water drops;
2 — Protected against water drops falling at a 15º angle;
3 — Protected against rain falling at a 60º angle;
4 — Protected against water splashes;
5 — Protected against water jets;
6 — Protected against large amounts of water;
7 — Protected against short-term immersion in water up to 1 meter deep;
8 — Protected against long-term immersion in water up to 3 meters deep.Lumens (Lm) are the unit of measurement for light flux, indicating the intensity and brightness of light emitted by a lamp or light fixture. Based on their quantity, you can choose a light fixture that will properly illuminate the entire room.
How to choose the right number of lumens in a light fixture?
450-800 Lm are used for decorative lighting, table lamps, bedside lamps. Light fixtures with up to 800 Lm brightness are suitable for creating a cozy environment.
800-1100 Lm are used for small rooms (bedrooms, hallways).
1100-1600 Lm are used for medium-sized spaces such as dining rooms, kitchens, bathrooms, and children's rooms.
1600-3000 Lm are used for large rooms (shopping malls, entire 11-18 square meter rooms).
Light fixtures with more than 3000 Lm emit very bright and intense light. They are used in workshops, garages, and industrial spaces.
To accurately calculate the required number of lumens for a room, use the formula:Lm = 150 lx * 4π * (distance in meters to the surface)²
To calculate how many and what type of light fixtures you will need for your desired room, visit this website: https://www.dialux.com/en-GB/download.
3 main types of white light:
Warm white (2700 - 3000 K)
Neutral white / daylight (4000 - 4500 K)
Cool white (5000 - 6500 K)
How to choose the right light color temperature:2700 - 3000K creates a cozy atmosphere in a room. Used in spas, hotel entrances, living rooms, and bedrooms.
4000 - 4500K is used in commercial, retail, office spaces, garages, medical buildings, as well as bathrooms, kitchens, and workrooms.
5000 - 6500K is suitable for lighting workshops, operating rooms, or other areas where attention to detail is important. Also suitable for outdoor lighting, modern interiors, and their accents.
To calculate how many and what type of light fixtures are needed for your desired space, visit this website: https://www.dialux.com/en-GB/download.This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.
CE certification means that the product has been evaluated according to the main criteria:
Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purposeCE marking allows this product to:
be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environmentsThe CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.
What does this mean for you as a buyer?
Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions
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