Directional LED bulb PAR30 | E27 | 25 W | 2400 lm | 4500K | 30° | black | OPTONICA | SP25-A2 | 1529

Lumen (lm) – unit of luminous flux: how much light a lamp or luminaire emits in total. Lux (lx) – illuminance: how much of that light falls on 1 m² of surface (1 lx = 1 lm/m²). Watts (W) only show power consumption – compare LED brightness by lumens.

How many lux does a room need?

How to calculate the lumens you need

Required lumens ≈ illuminance (lx) × area (m²) ÷ 0.5

The 0.5 factor accounts for light absorbed by walls, ceiling and diffusers and for luminaires getting dirty over time. Example: 18 m² garage, 200 lx → 200 × 18 ÷ 0.5 = 7,200 lm. That is about three 150 cm T8 LED tubes of ~2,500 lm each.

This is an estimate. For an exact design (workplaces, production, public areas) use lighting calculation software, e.g. DIALux.

Recommended values are indicative, based on the principles of EN 12464-1 for workplace lighting.

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 purpose

CE 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 environments

The 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