Please adhere to the specifications in the assembly instructions regarding installation dimensions and distances from flammable materials. This is necessary to prevent fires, allow space for sufficient air circulation and enable the installed components to achieve their design service lives. The dimensions were set by the German safety standards authority TÜV, which certified the lamps. There must be no insulation material or vapour seals within the specified distances. In the case of concrete, smaller safety distances are permissible if sufficient air circulation is ensured.

Mike India recessed luminaires/ installation in insulation and vapour seals

Luminaires with halogen lamps must not be covered by insulation. In order to avoid melting and fires, vapour seals (PVC sheets) must not make contact with the housing.

Luminaires/installation in concrete walls

When installed in exposed concrete walls, Nimbus luminaires must be mounted in a modified Nimbus recessing box for concrete. Please mention this requirement when placing your order. In the case of concrete walls that are to be plastered, Nimbus luminaires can be installed with Nimbus installation kits for brick/hollow blocks or with Nimbus recessing boxes for concrete.

Recessed luminaires/installation in wet rooms

For use in wet rooms, the luminaires mike india 50, 70 and 125 can be furnished with a spray-proof cover at extra charge. Luminaires that have been modified in this way may not be installed in, above or near a shower. They may not be installed in vertical walls, because dripping water might enter the housing. In the case of mike india 50 and 70, the transformer should be mounted outside the wet room. If luminaires with such modifications are to be installed in exterior areas, such as under projecting roofs, one should first consult with Nimbus Design. The protection class of the modified luminaire is still IP20.

mike india 70/installation in concrete ceilings with Kaiser recessed housings

Installation in exposed concrete ceilings.
The mike india 70 luminaire can be installed in exposed concrete ceilings using the square-faced Halox-O collar made by Kaiser.

Housing for 230-volt luminaire and 12-volt luminaire: Kaiser Article Number 1290-40
Housing for 12-volt luminaire with transformer tunnel: Kaiser Article Number 1290-41
Square front section 68 x 68mm: Kaiser Article Number 1290-70

*Installation in panelled ceilings and filigree ceilings: *
The mike india 70 luminaire can be installed in panelled ceilings and filigree ceilings using the Halox-P collar made by Kaiser. After demoulding, the opening must be created on location; this makes it possible to determine the location and axis of the luminaires. Kaiser products can be obtained from wholesale and retail suppliers for electrical goods. Information can be found at www.kaiser-elektro.de or at Nimbus Group.

Rahmenlos(Frameless) luminaire/installation in concrete ceilings or walls

Plastered concrete.
The frameless luminaire can be installed in a concrete wall or ceiling prior to plastering, using a recessing box for concrete. The edge of the housing is later covered by filler and paint.
Exposed concrete.
Nimbus recessing boxes cannot be used for installing frameless luminaires in exposed concrete because the edge of the housing would remain visible after demoulding and would not be covered by a luminaire frame such as on mike india 70. We recommend attaching a separation frame measuring 83 x 83 x 120mm (length x width x depth) to the formwork and anchoring the luminaire in this space after demoulding. Coil springs should be put over the screws as shown in the diagram below; the screws can then be tightened against the springs until the luminaire lies flush in the opening.

rahmenlos: light distribution on the cover glass

Reflector lamps project a circular pattern on the protective cover. Their higher light output makes them suitable for ceiling use. Free-radiating lamps such as pin-base lamps or Halopin lamps illuminate the glass more evenly but have lower output.

mike tango luminaires/covers

Covers for mike tango luminaires are available with a satin-frosted or opalwhite finish. Satin-frosted finish. Satin-frosted covers (frosted translucent acrylic glass) have a transparency of about 90%. These covers are best suited for ceiling lights. Opal-white finish. Opal-white covers (white acrylic glass) have a transparency of about 70%. Owing to the more uniform light distribution of the diffuser and the lower glare, these covers are best suited for wall lights.

Emergency operation

All Nimbus luminaires containing compact or conventional fluorescent lamps and equipped with electronic ballasts can be operated in directcurrent emergency power systems with a central battery backup according to VDE 0108. The necessary change-over switches must be installed. Some luminaires can be supplied on request with emergency storage battery backup units having a 3-hour capacity. You’ll find a list of these luminaires at the beginning of the booklet. In emergency mode only one of the lamps lights up, assuring a certain minimum level of illumination.

Multiwatt ballasts

The mike zulu T5, airline and air maxx 60 luminaires can be equipped with electronic multiwatt ballasts on request. These make it possible to use both HE (high-efficiency) and HO (high-output) T5 lamps. No adjustments or changes are necessary in the lamp or ballast.

IP classes

1st code number: protection against foreign bodies and contact:
0 unprotected
1 protected against foreign bodies > 15mm
2 protected against foreign bodies > 12mm
3 protected against foreign bodies > 2.5mm
4 protected against foreign bodies
5 protected against dust
6 sealed to dust
7 –
8 –

2nd code number: protection against water:
0 unprotected
1 protected against drip water
2 protected against drip water below 15°
3 protected against spray water
4 protected against spray water
5 protected against spray water
6 protected against heavy sea
7 protected against the effects of submersion
8 protected against submersion

Example: IP 21 = protected against solid foreign bodies > 12mm and against drip water

Dimming

With halogen lamps, dimming is no problem. With fluorescent and compact fluorescent lamps, special electronic ballasts are necessary. The customer or electrical planner must decide how dimming should be accomplished: – switchDIM, digital dimming by means of a button (max. 20 lamps per circuit)
– DSI control, digital systems from Tridonic
– 1-10 volt control line
– DALI (digital addressable lighting interface)
– bus systems (LON bus/EIB)

Dimming of lamps with electronic ballasts

1. Dimming using switchDIM:

Dimming is carried out using a commercially available wall-mounted switch (N.O. contact). Between the control switch and the luminaire (ballast) there must be a 5-wire connection that is able to withstand mains voltage. The five lines can be combined in a cable. The luminaire is turned on and off by pressing the button briefly. By pushing the button and holding it, one can dim up or down. When the switch is turned back on, the most recent setting of the dimmer is restored. If several ballasts are connected to one switch, they will be synchronised if the switch is held down for longer than 10 seconds, after which they will dim up and down together.

2. Dimming with a 1-10 V connection:
The luminaire is controlled via an interference-proof DC signal of between 1 volt (minimum brightness, closed control line) and 10 volts (maximum brightness, open control line). All control lines between system components must be designed for a mains voltage of 230 volts. Make sure not to reverse the polarity of the control line. If + and – are reversed, the maximum lighting level cannot be achieved. Simple wiring with a 5-pin connection is possible. It is not necessary to lay separate control lines or to shield them (according to DIN VDE 0100 520 Section 6, main circuits and associated auxiliary circuits can be laid together, even if the auxiliary circuits carry a lower voltage than the main circuits).

3. Dimming with DALI (digital addressable lighting interface):
DALI is a standard shared by many manufacturers for the digital control of electronic ballasts. Individual lamps are assigned digital addresses, allowing them to be arranged into switching or dimming groups and regrouped as desired. The original installation need not be modified for this purpose. The central element is a DALI control unit, which is activated by transmitter buttons, daylight sensors or programmable remote control units. A DALI ballast can be connected using any 5-wire connection that is able to withstand mains voltage (e.g., 5-wire NYM). Control is via two wires that lead from the DALI control unit. There is no need to observe correct polarity for these lines. Light control with DALI can also be integrated into complex building control systems.

Wall paint recommendation:

Dirt or dust can sometimes accumulate on the wall above luminaires. This effect can be minimised through the choice of a suitable wall paint:
Emulsion-free and solvent free: According to the manufacturers, these paints contain no solvents and therefore have hardly any tendency to collect dirt.

Interference with radio reception

In principle, an electronic ballast can interfere with radio reception:
– within a range of about 2m from the ballast
– if antenna cables pass near a ballast (closer than approx. 60cm)
– all electronic ballasts used by Nimbus are tested, approved units that conform to EMC guidelines.

Photometric data files (Eulumdat)

Eulumdat photometric data files can be downloaded in .ldt format from the download area.

Installation and assembly instructions

Illustrated installation and assembly instructions can be downloaded in .pdf format from the download area.

Illustrations/drawings/dimensions

Illustrations and scale drawings of all Nimbus products can be downloaded from the download area.

Light planning/light calculation

You can obtain help on light planning and light calculations at lichtplanung@nimbus-group.com

Calls for tenders

You can obtain the text of calls for tenders for Nimbus luminaires at projektabteilung@nimbus-group.com