Public lighting, urban commitment with Deltrian.

The light of all artificial lighting devices decreases over time. It is generally agreed that the lifespan of an LED product is fixed when this product still emits 70% or 80% of its initial flux.

The lifespan of an LED is the time after which a certain percentage (B) of the LED emits a luminous flux lower than a certain percentage (L) of the initial flux.

How to read a technical data sheet?

• Luminous flux at 50,000 hours L70B50: means that after 50,000 hours of operation, 50% of the LEDs will maintain their flux at more than 70% of the original flux.
• Luminous flux at 35,000 hours L80B10: means that after 35,000 hours of operation, 10% of the LEDs have a flux lower than 80% of the original flux.

Initial illumination studies should take into account the aging of sources and the decrease in flux over time.

The luminous power of an LED device is not expressed in Watt (a unit unfortunately too often used) but in Lumen. Indeed, to give light, the LED device consumes energy which is expressed in Watt and the amount of light emitted by this same device is expressed in Lumen.

Two competing devices of 20W each can therefore give totally different amounts of light depending on their luminous efficiency.

The luminous efficiency of an LED is therefore expressed in Lumen/Watt. For example, a device that consumes 100W to give 10,000 Lumens will therefore have an efficiency of 100 Lumens/W.

And what about Lux?

While the Lumen expresses the amount of light coming out of an LED device in all directions, Lux expresses a quantity of light received on a specific surface (the work surface of an office, for example).

• Return on investment in less than 3 years in general.
• Energy savings of more than 65% (on 500 tubes up to 33,000 euros after 4 years and 94,000 euros after 8 years depending on the number of hours of use and the price of your electricity).
• High efficiency (110 to 190 lumen/Watt).
• Long lifespan (40 to 50,000 hours).
• You avoid 4 to 5 relamping of your old bulbs, so huge maintenance gains.
• IRC above 75 (very good color rendering).
• Instant lighting.
• No mercury or lead emissions in tubes.
• No UV emission.
• No stroboscopic effect (flashing).
• Operating temperature without alteration of the lifespan or performance of devices: from -20°C to +60°C.
• Storage temperature +85°C.
• Number of clicks without altering the lifespan: 3,000,000.
• No need for manipulation with old fixtures with magnetic ballasts (just remove the starter).
• No more replacement of ballasts, starters, sockets or burned cables.
• In case of new installation, no need for high-efficiency fixtures, in fact, our devices have their own reflector (cost savings in investment).

Some wavelengths of light emitted by the sun or artificial lighting products can be dangerous for eyes or skin. This includes UV emitted by the sun that can cause burns or even skin cancer.

As these wavelengths are not visible to the human eye, a standard exists (IEC 62471) to determine harmful wavelengths (mainly UV below 400 nm and IR above 780 nm).

For lighting products, the standard provides a risk class (Class Risk or RG) in 4 points:

• RISK GROUP 0 (RG0) = no danger
• RISK GROUP 1 (RG1) = no danger for normal use of the product
• RISK GROUP 2 (RG2) = no danger if aversive response or thermal discomfort
• RISK GROUP 3 (RG3) = DANGER, even for short exposure

All Deltrian products have a Class Risk 0 or 1 certificate.

Contrary to preconceived ideas, LEDs can produce about as many color temperatures as non-LED traditional lighting.

In general, manufacturers offer several standard color temperatures expressed in degrees Kelvin but, for commercial ease, they have given a name (which may vary depending on the manufacturer) to each color temperature.

Example: 3000K° = warm white / 4000K° = daylight white or natural white / 5000K° = pure white / 6000K° = cool white.

It is good to know that the luminous efficiency of an LED is different for each color temperature, so the higher the LED increases in degree Kelvin (i.e. the more the LED moves towards cool whites) the higher the efficiency.

LED allows for enormous energy savings (and therefore actively contributes to the reduction of carbon emissions) which can vary depending on the lighting they replace without losing light.

Thus, a 500W halogen bulb is replaced by a 50W LED device (i.e. 10 times less consumption).

A 58W fluorescent tube (which actually consumes 73W with its ballast) will be replaced by a 22W LED (i.e. 3 times less consumption).

A 400W sodium bulb (used to illuminate our roads and consuming 480W with its ballast) will be replaced by a 180W LED (i.e. 2.5 times less consumption).

But that’s not all: as the lifespan of an LED is 3 to 6 times superior to traditional lighting (up to 15 times if compared to halogen lamps) we achieve very important maintenance savings.

There are a huge number of LED products on the market and not all offer the same quality. So how do you choose the right quality when all LEDs look the same?

• By using heat-dissipating materials (aluminum and tin) because heat is the main reason for the death of the chipled.
• By using high-performance transformers (drivers) that are well-protected and generate little heat, ensuring increased protection for your installation.
• By using the most efficient chipled on the market (efficiency > 200 Lumen/Watt) that resist heat.
• By mastering the production of all LED components and electronic circuits in-house with a minimum of 7 quality controls on the production lines. This allows complete control at all stages of product manufacturing.

By offering a complete warranty on the products:

• The majority of devices in our range are guaranteed for 5 years (43,800 hours) without exclusion clauses
• Warranty in case of malfunction of the device
• No limit on usage hours
• No limitation on clicks
• No requirement for electrical networks
• No requirement for ambient temperature
• No requirement for humidity levels

1. Products of the highest quality and reliability on the market
2. A wide choice of highly efficient LEDs, ensuring large savings
3. A team of qualified technicians always available to answer all your questions
4. A high-performance and quality service
5. Payment facilities (leasing)
6. Assurance of your peace of mind
7. A state-of-the-art lighting study office accompanies you in all your projects

It should be noted that the production of 1 kWh of electricity generates the release of 0.29 kg of CO2 into the atmosphere.

Practical case:

Knowing that a parking lot is lit by +/- 500 tubes, you have the possibility to switch from a consumption of +/- 294,000 kWh/parking/yr to a consumption of +/- 100,375 kWh/parking/yr.

Namely a reduction of 193,625 kWh/parking/yr.

Therefore, 56150 Kg (193,625 x 0.29) less CO2 in the atmosphere.

For reference, this is the annual pollution generated by 17 cars traveling +/- 25,000 km each!