Linelight that adds dynamics to warehousing

TL vs. LED

"There is much to gain in lighting industrial halls and warehouses. Think about the energy savings when a hall is not lit if it's not in use."

TL vs. LED

Tube light (TL)Tube light (TL) are the most sold product for industrial halls and warehouses. Efficiency of the product is high and cost is very acceptable.
Weak points against LED-solutions are the inability to dim to very low energy levels and the cost of replacing lamps installed on high ceilings (3 to 15 meters), which may be necessary every year in some cases.

Retrofit T-LEDs are an option, but even more efficiency can be found in a bespoke LED solution.


Our partner designed a linelight with LEDs with interchangeable LED/Optics package depending on the specific needs of the end-user.

  • To have a driver that has extremely long lifetime (temperatures below flat roofs are very high in summer time)
  • To have a reliable communication system inside a building which can talk to each individual lamp, so that dimming can be done in sections where there is no activity


Inside a hall
  • A central power supply creates a DC network inside a hall
  • A communication module (programmable) is located in the same enclosure
  • By using a cleverly created power line communication protocol, the system is able to speak to each individual driver/lamp and is DALI-compatible
  • Lamps can be grouped to act as one
  • Sensors can tell the system where light is needed or not
  • De DC drivers inside the lamps have a lifetime of >100.000 hours


Schematic version of a warehouse with dynamic lighting.


The final solution at work

The system was put to test for 6 months, back-to-back with a T5 solution from a AAA-class supplier. Result: Best-in-class, lower Cost of Ownership than tube lights. Highly reliable.
Added benefits such as lights that act as guides in cases of emergency. Lights that indicate the location of an items on stock. Everything is equipped to run on a UPS or other external power source.
Linelights used at a warehouse

Questions about this project?

Please contact our Managing Director Erik van Beusekom for questions about Linelight that adds dynamics to warehousing. You can also call Erik: +31 (0)76 58 16 969.
LED Wiki: Wi-Fi, Zigbee and Bluetooth compared
Key characteristics of ZigBee, Wi-Fi and Bluetooth
Range10-100 meters50-100 meters10 – 100 meters
Networking TopologyAd-hoc, peer to peer, star, or meshPoint to hubAd-hoc, very small networks
Operating Frequency868 MHz (Europe) 900-928 MHz (NA), 2.4 GHz (worldwide)2.4 and 5 GHz2.4 GHz
Complexity (Device and application impact)LowHighHigh
Power Consumption (Battery option and life)Very low (low power is a design goal)HighMedium
Security128 AES plus application layer security 64 and 128 bit encryption
Typical ApplicationsIndustrial control and monitoring, sensor networks, building automation, home control and automation, toys, gamesWireless LAN connectivity, broadband Internet accessWireless connectivity between devices such as phones, PDA, laptops, headsets
LED Wiki: DALI - Digital Adressable Lighting Interface
Standards for DALI
IEC 60929 and IEC 62386 are technical standards for network-based systems that control lighting in building automation. They were established as a successor for 0-10 V lighting control systems, and as an open standard alternative to Digital Signal Interface (DSI), on which it is based. IEC 60929 is the first version of the standard and will be withdrawn by 23rd of June 2014. Members of the AG DALI are allowed to use the Digital Addressable Lighting Interface (DALI) trademark on devices that are compliant with the current standard. Non AG DALI members can apply for a fee bearing licence.

A DALI network
A DALI network consists of a controller and one or more lighting devices (e.g., electrical ballasts and dimmers) that have DALI interfaces. The controller can monitor and control each light by means of a bi-directional data exchange. The DALI protocol permits devices to be individually addressed and it also incorporates Group and Scene broadcast messages to simultaneously address multiple devices (e.g., "Group 1 goto 100%" or "Recall Scene 1").

Each lighting device is assigned a unique static address in the numeric range 0 to 63, making possible up to 64 devices in a standalone system. Alternatively, DALI can be used as a subsystem via DALI gateways to address more than 64 devices. Data is transferred between controller and devices by means of an asynchronous, half-duplex, serial protocol over a two-wire differential bus, with a fixed data transfer rate of 1200 bit/s.

DALI requires a single pair of wires to form the bus for communication to all devices on a single DALI network. The network can be arranged in a bus or star topology, or a combination of these. The DALI System is not classified as SELV (Separated Extra Low Voltage) and therefore may be run next to the mains cables or within a multi-core cable that includes mains power. The DALI data is transmitted using manchester encoding and has a high signal to noise ratio which enables reliable communications in the presence of a large amount of electrical noise. DALI employs a diode bridge in the interface circuitry so that devices can be wired without regard for polarity. Signal level are defined as 0±4.5 Vfor "0" and 16±6.5 V for "1". Central interface power maximum is 250 mA and 2 mA per unit. The network cable is required to be mains-rated, with 600 V isolation and at least a 1 mm cross-section, with a maximum drop of 2 volts along the cable (max 300 m). Signal interface is galvanically separated and doesn't need any termination resistors.

Earlier generations of DALI devices stored configuration data in EEPROM, which was problematic due to the limited number of write cycles supported by EEPROMs. In current generations of DALI devices, RAM is used in preference to EEPROM during normal operation, which significantly reduces the number of EEPROM writes and thus extends their lifetimes. This use of RAM, however, is patented and therefore mandates payment of a license fee.

More on DALI.