THE WAY

With symmetric floodlights, on the other hand, the light is distributed evenly in all directions. Asymmetric floodlights can achieve up to a 50% better output utilisation into the intended illuminated area. With the benefit of a lower light pollution, they are best suited in areas where light distribution and its effect on neighbours is a consideration. This makes them ideal for installation in built-up areas such as towns and cities, for example, for use in sports grounds, warehouses and loading bays.

All Ovia Inceptor Ace floodlights are IP65 rated and come with a five-year warranty. They are available in a black finish, in 50W, 100W, 150W, 200W and 300W versions, with 4000K cool white LEDs. They are supplied with a 2m pre-wired cable flex for quick and easy installation, and a fully adjustable aluminium mounting bracket, which allows full control of the projection angle.

The Inceptor Ace floodlights are also available in photocell versions (100W, 150W, 200W and 300W). With all the features and benefits of the standard fitting described above, the photocell option allows for use with remote PIRs or microwave sensors. The photocell versions turn the light on when the light level drops under 10-20 lux and turns the light off once the light level is over 30-60 lux.

Gator LED Street Lighting

Ovia’s portfolio of floodlight solutions also includes the Gator range of LED Street Lighting with CTA Switch. With an IK10 housing and IP66 rated, Gator is ideal for lighting larger outdoor areas, such as car beam angle. They are available in a grey finish and come with a five-year warranty. The reversible mount option is an additional feature. The mount bracket can be rotated and pivoted to allow for vertical or horizontal fitment, with no additional joints required. The Spigot size is 76mm and a wall bracket is available. The shorting cap can be replaced with a photocell sensor to assist with energy saving.

Inceptor Murus

Inceptor Murus is an LED Wall Pack with CTA Switch and a robust IK10 rated housing that makes it ideal in outdoor settings. The IP66 rated fitting is designed to be fast and simple to install and is available in 15W and 25W options and in a choice of standard, photocell and emergency versions. The photocell version can assist with energy saving by allowing the light to turn on and off at set lux levels. Inceptor Murus will turn on when the lux level is below 10-30 lux.

Installation of the Murus is quick and easy, thanks to the Push Fit/Piano Key Terminal Block and the floodlight can be Besa box or trunking mounted. All models include a CTA Switch, allowing the product to change colour temperature between Warm White 3000K, Cool White 4000K and Daylight 6000K. It is available in anthracite grey or light grey and comes with a five-year warranty.

DALI compatibility

Ovia also offers the Murus with a DALI driver. This means that the luminaire can be monitored for energy efficiency and status. With the addition of DALI compatible sensors or programming to the system, the Murus, through use of Presence, Absence and daylight dimming, can maximise the efficiency of all luminaires. Through programming, DALI also offers the option of grouping luminaires, setting scenes and timed overrides, so along with all their other features and benefits would be suitable for all external applications.

DALI – the facts

• It is an open protocol – any manufacturer can use it.

• Installation is simple. Power and control lines can be laid together and no shielding is required.

• The wiring topology can be in the form of a star (hub and spoke), a tree or a line, or any combination of these.

• Communication is digital, not analogue, so the exact same dimming values can be received by multiple devices, resulting in very stable and precise dimming performance.

• All devices have their own unique address in the system, opening a very wide range of possibilities for flexible control. This also allows all devices to be individually monitored and maintained.

How does DALI work?

The core of DALI is a bus – a pair of wires that carries digital control signals from input devices (such as sensors) to an application controller. The application controller applies the rules with which it has been programmed to generate outgoing signals to devices such as LED drivers.

• Bus power supply unit (PSU). This component is always required. It maintains the bus voltage at the required level.

• LED fittings. All light fittings in a DALI installation require a DALI driver. A DALI driver can accept DALI commands directly from the DALI bus and respond accordingly. The drivers can be DALI or DALI-2 devices, but if they are not DALI-2 they will not have any of the new features introduced with this latest version, such as querying control gear failure, resending failed commands, or identifying devices.

• Input devices – sensors, switches etc. These communicate with the application controller using 24-bit data frames. They do not communicate directly with the control devices (DALI 2 only).

• Instances. Often, a device such as a sensor will contain a number of separate devices within it. For example, sensors often include a movement detector (PIR), a light-level detector and an infra-red receiver. These are called instances – the single device has three instances. With DALI-2, each instance can belong to a different control group and each can be addressed to control different lighting groups.

• Control devices – application controller. The application controller is the ‘brains’ of the system. It receives 24-bit messages from the sensors (etc.) and issues 16-bit commands to the control gear. The application controller also manages the data traffic on the DALI bus, checking for collisions and re-issuing commands as necessary.

As a business, Ovia is continually developing products that incorporate the latest technology, and the company’s list of fittings that are compatible with the DALI protocol continues to be expanded. Ovia recently introduced a DALI signal converter which will transform 0-10V/PWM dimmable light fittings, such

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