What is the rule of thumb for downlights?

The standard rule of thumb for downlight spacing is to install one fixture per square metre of floor area for general illumination, with approximately one metre spacing between adjacent downlights and half a metre distance from walls. However, professional event applications require more nuanced calculations based on beam angle, mounting height, and desired lux levels. For stage lighting, You typically need 800-1200 lux at performer level, which might require higher-output fixtures or closer spacing. Always account for ceiling height – as mounting distance increases, You need either more powerful fixtures or tighter spacing to maintain adequate illumination. For truss-mounted installations, calculate coverage based on the beam angle at Your specific mounting height, and overlap beams by approximately 30% to avoid dark spots between fixtures.

Do you need an electrician to change downlights?

In professional event installations, qualified electricians or certified event technicians must perform all electrical work involving mains voltage connections. Whilst replacing a GU10 lamp in a non-integrated downlight is straightforward and doesn't require electrical qualifications, any work involving wiring, driver replacement, or fixture installation must comply with local electrical regulations and venue safety requirements. For touring productions and temporary installations, the person performing electrical work should hold relevant qualifications and work under DGUV Vorschrift 17 guidelines. Integrated LED downlights where the light source is permanently built into the fixture require complete fixture replacement when the LED fails, which constitutes electrical work requiring qualified personnel. Always verify Your venue's specific requirements – many professional spaces mandate that only their approved contractors perform electrical modifications.

What are the best downlights to buy?

The best professional downlights for event technology depend on Your specific application requirements rather than a single "best" model. For DMX-controlled stage applications, fixtures from manufacturers like Cameo and Showtec offer excellent reliability and feature sets, with prices ranging from £150-£400 for quality DMX-controllable units. For architectural integration in permanent venues, Osram, Philips, and SLV produce robust fixtures with consistent colour rendering (CRI 90+) and long-term reliability. Key selection criteria include: lumen output matching Your coverage requirements (1000-3000 lumens for most event applications), appropriate beam angle (15-60° depending on mounting height), flicker-free operation above 1200Hz for video work, and proper IP rating for Your environment (IP44+ for outdoor or high-humidity applications). Fire-rated models meeting EN 1365-2 standards are essential for permanent installations, whilst truss-mounted touring fixtures should prioritise robust die-cast construction.

What is the purpose of downlights?

Downlights in professional event technology serve multiple purposes beyond simple illumination. Their primary function is to provide focused, directional lighting that creates clean, shadow-controlled coverage without visible bulky fixtures disrupting the aesthetic. In stage applications, downlights deliver the foundational wash layer that ensures performers and presenters are properly lit for both live audiences and video capture. For corporate events, downlights provide the consistent, flicker-free illumination required for professional video production, typically delivering 800-1200 lux at stage level. In exhibition environments, downlights highlight products and displays with precise beam control, directing attention exactly where needed. The recessed or low-profile design maintains clean sightlines and modern aesthetics, whilst the fixed mounting position provides reliable, repeatable lighting that doesn't require constant adjustment. When integrated with DMX control systems, downlights become programmable elements that can shift colour temperature, dim smoothly, or create dynamic scenes synchronized with show cues.

How many downlights do I need for a stage setup?

Calculating the required number of downlights for a stage setup depends on stage dimensions, mounting height, desired lux levels, and fixture specifications. For a typical 4m × 6m presentation stage with 3-metre mounting height, You would need approximately 8-12 downlights producing 1500-2000 lumens each with 40-50° beam angles to achieve 800-1000 lux coverage suitable for video production. The calculation involves determining the beam diameter at stage level (mounting height × tangent of half the beam angle × 2), then arranging fixtures to provide 30% beam overlap for even coverage. Higher mounting positions require either more powerful fixtures or increased fixture count. For theatrical applications with more dramatic lighting requirements, You might use fewer downlights at higher intensity for accent coverage rather than even wash. Always create a lighting plot that accounts for Your specific fixture specifications, mounting positions, and coverage requirements, and verify calculations with photometric software for critical installations.

What IP rating do I need for event downlights?

The required IP (Ingress Protection) rating for event downlights depends on the installation environment and exposure conditions. For indoor venues with controlled environments, IP20-rated downlights provide adequate protection against solid objects larger than 12.5mm and are suitable for most stage and conference applications. When working in environments with atmospheric effects like fog or haze machines, IP44-rated fixtures offer protection against water splashing from any direction and prevent moisture ingress that could damage electronics. Outdoor events or semi-outdoor structures require IP54 (dust-protected and splash-proof) or IP65 (dust-tight and protected against water jets) ratings to withstand weather exposure. For installations near pools, fountains, or in high-humidity environments, IP65 or higher is mandatory. Remember that higher IP ratings typically add cost and may affect thermal management, so specify the minimum rating that meets Your environmental requirements rather than automatically choosing the highest available protection level.

What are fire-rated downlights and when are they required?

Fire-rated downlights are fixtures designed to maintain the fire-resistance integrity of a ceiling when a hole is cut for recessed installation. They incorporate intumescent materials that expand when exposed to heat (typically at temperatures above 150°C), sealing the ceiling penetration and preventing fire and smoke from spreading between floors. Fire-rated downlights are certified to maintain this barrier for specific durations – commonly 30, 60, or 90 minutes – as tested to EN 1365-2 standards. In professional event technology, fire-rated downlights are mandatory in permanent installations within buildings where ceiling fire ratings must be maintained, including theatres, conference centres, and corporate venues. Temporary structures may also require fire-rated fixtures depending on local regulations and venue requirements. When installing downlights in false ceilings or suspended structures, verify whether fire rating is required – the modest cost premium (typically 20-40% over non-rated fixtures) is insignificant compared to the liability and safety risks of non-compliant installations.

Can I control downlights with DMX for dynamic lighting effects?

Yes, DMX-controllable downlights enable dynamic lighting effects and programmable scenes essential for professional event production. DMX (Digital Multiplex) is the industry-standard protocol for controlling stage lighting, allowing You to adjust intensity, colour temperature (in tunable white models), or full RGB/RGBW colour mixing from a lighting console. Basic DMX downlights use one channel for dimming, whilst tunable white fixtures require two channels (intensity and colour temperature), and RGBW colour-mixing units demand four or five channels. When designing a DMX-controlled downlight system, plan Your channel allocation carefully – a 512-channel DMX universe fills quickly when controlling dozens of fixtures. Professional DMX downlights incorporate RDM (Remote Device Management) capability, allowing remote addressing and configuration through the lighting console rather than manually setting DIP switches on each fixture. For installation, use proper DMX512-compliant cabling with 5-pin XLR connections and 120-ohm termination, or specify wireless DMX systems with frequency-hopping technology for reliable cable-free control in temporary installations.

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Downlights

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SLV HORN GU10 Downlight, rund, mattschwarz, max. 50W

SLV HORN 1 recessed fitting, QPAR51, single-headed, round, matt black, max. 50W, incl. clip springs

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SLV HORN-T, recessed fitting, QPAR51, round, matt white, tiltable, max. 50W, incl. clip springs

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LEDVANCE SPOT AIR ADJUST 4W 930 DIM IP23 BK

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LEDVANCE RECESS SLIM DOWNLIGHT LED Deckenleuchte 220…240V 4,50W / 3000K Warmweiß

LEDVANCE RECESS SLIM DOWNLIGHT 85mm 4.5W 3000K

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SLV KADUX 2 Einbauleuchte, QPAR51, max. 100W, schwarz matt

SLV KADUX 2 recessed fitting, double-headed, QPAR51, rectangular, matt black, max. 100W, incl.

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KADUX 1 GU10 Downlight, eckig, mattschwarz, max. 50W

SLV KADUX, recessed fitting, single-headed, QPAR51, square, matt black, max. 50W, incl. clip springs

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SLV UNIVERSAL DOWNLIGHT Abdeckung, für Downlight IP20, schwenkbar, rund, weiss

SLV UNIVERSAL DOWNLIGHT Cover, for Downlight IP20, pivoting, round, white

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SLV NUMINOS® MOVE XL, Deckeneinbauleuchte weiß/schwarz 4000 K 55°

SLV NUMINOS® MOVE XL, white/black recessed ceiling light 4000 K 55°

NUMINOS is the best possible coordinated light system from SLV that combines function, design and technology. With various downlights and spotlights, you can experience a thousand lighting design...

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