Spotlight, projector or floodlight?

The names overlap in the market, so selection should be based on photometric performance. A narrow-beam spotlight is suited to precise long-distance accent; a medium beam supports general accent lighting; a flood optic covers wider architectural surfaces. For large exterior distances, a projector/floodlight body may provide the required candela and thermal performance.

Key selection parameters

• Beam angle and field angle
• Centre-beam intensity in candela
• Mounting and aiming distance
• Lumen output and system wattage
• CCT and colour quality
• Glare control accessories, snoots and honeycombs
• Track, recessed, surface or custom mounting
• IP rating for damp or exterior locations
• Dimming protocol and scene control

Mosque spotlight applications

Spotlights can illuminate the inside of a central dome, calligraphy medallions, mihrab details, arches, columns, muqarnas and decorative ceiling zones. The chandelier should not be treated as the only light source: focused accent light can add hierarchy while indirect light provides the background layer.

Museum and gallery applications

Exhibition lighting often benefits from adjustable track spotlights because artwork and display layouts change. Good colour quality, optical control and repeatable aiming are more important than raw lumen output. Conservation-sensitive objects require project-specific illuminance and exposure limits.

Glare and sightlines

High-ceiling projectors can become visible from the floor if aiming is not coordinated with occupant sightlines. Shielding, cut-off accessories, mounting position and aiming angle should be tested in calculation or mock-up.

How many spotlights are required?

Do not determine quantity from wattage alone. Use a photometric calculation based on geometry, target illuminance, beam spread and overlap. This is especially important when lighting a curved dome or tall facade.

Spotlight optic selection table

Beam diameter and aiming distance

The illuminated patch becomes larger as distance increases. This is why a spotlight that looks correct in a showroom may be too wide or too weak when installed 10–20 metres away. Beam-angle calculations are useful for first estimates, but final selection should also consider candela distribution and field angle.

Glare-control accessories

• snoots and cylinders to shield the source from view
• honeycomb louvers to reduce high-angle brightness
• barn doors or shutters for spill control
• framing accessories for precise edges
• lenses for beam shaping, diffusion or elliptical distribution

Mosque applications

For mosque interiors, spotlights can support rather than compete with the chandelier. Common targets include inner dome surfaces, calligraphy medallions, mihrab details, muqarnas, structural arches, decorative pendants and selected wall panels. Aiming should avoid direct view of bright apertures from normal prayer positions.

Museum and gallery applications

Adjustability is often essential because exhibition layouts change. Track-mounted spotlights can be re-positioned, while framing or beam-shaping accessories help isolate light to individual works. Colour quality and consistency should be specified together with optics.

Spotlight specification checklist

• system wattage and delivered lumens
• beam / field angle and candela data
• CCT and colour quality
• dimming/control protocol
• rotation and tilt range
• track, recessed or surface-mount interface
• glare-control accessories
• driver location and maintenance access
• IP rating where exposed
• IES/LDT file availability

Questions fréquentes

Is a 10° beam always better for a high dome?

No. A very narrow beam can create bright spots and poor overlap. Mounting distance, target size and desired contrast should determine the optic.

How many spotlights should overlap?

There is no universal number. Overlap should be evaluated photometrically so the target receives the intended distribution without excessive hot spots.

Can spotlights replace wall washers?

They can accent portions of a wall, but they normally do not produce the same uniform vertical field as a purpose-designed wall washer.