1Principio di scelta: prima chiarire l’uso, poi scegliere 6W o 8W

La prima decisione non è quale watt sembri più forte, ma se la stanza richiede Fixed CCT with dimming or Tunable White. Solo dopo ha senso confrontare 6W e 8W.

Con Fixed CCT si sceglie una sola temperatura di colore, per esempio 2850K bianco caldo o 4000K bianco neutro, e poi si regola la luminosità. Uno spot LED 6W è spesso adatto a corridoio, camera, bagno e illuminazione generale moderata. Uno spot LED 8W è più indicato per cucina, zona pranzo, piani di lavoro, ambienti più grandi, soffitti alti o valori lux più elevati.

For Tunable White, wattage alone is not enough. Two colour channels are mixed, and available brightness changes with colour temperature and controller logic. Define the colour temperature of the brightest scene first, then check the maximum luminous flux at that point. Higher colour temperatures often look brighter than lower ones at the same measured lumen value.

A 4W+4W Tunable White spot such as the TILLUME Expert 81061M04 is a special case. It should not be treated as a normal 4W room option or as a conventional 8W spot.

2Fixed CCT dimmerabile o Tunable White?

3Perché i watt da soli non bastano

Il watt indica il consumo elettrico. Il lumen indica la quantità di luce visibile. Per progettare una stanza, i lumen rispondono meglio alla domanda reale: l’ambiente sarà abbastanza luminoso?

Lighting design also works with layers: general lighting, accent lighting and additional or functional lighting. TILLUME LED spots mainly provide broad general light. In real projects they Sono spesso combinati con strip LED, luci sottopensile o altri apparecchi per piani di lavoro, nicchie, mensole, scale o zone scure.

• General lighting: overall room brightness, often using wide-beam ceiling spots.
• Luce d’accento: targeted light for pictures, shelves or niches. Narrower optics are better than broad 60° illuminazione generale spots.
• Illuminazione funzionale: luce aggiuntiva dove l’illuminazione generale non basta, per esempio strip LED sotto i pensili, nelle mensole, sulle scale o nei dettagli indiretti di soffitto e parete.

Anche i lumen da soli non bastano. Lux target, superficie, angolo del fascio, distanza tra spot, materiali, altezza del soffitto, dimmerazione, scene e, per Tunable White, logica del controller influenzano il risultato.

4Lumen, lux e dimensione della stanza: il calcolo corretto

Lumen necessari = superficie della stanza in m² × illuminamento target in lux
Numero di spot = lumen necessari ÷ lumen massimi per spot

Use maximum lumens because the system must reach the target lux value at full brightness. In everyday use it will usually be dimmed down depending on the scene.

Esempio: un soggiorno di 12 m² with 150 lx basic lighting needs about 1800 lm. With 600 lm per 6W spot, that is roughly three spots. In a bright room with white walls and normal ceiling height this can work well; dark surfaces, timber ceilings or 3 m ceiling height may require more spots, 8W spots or additional light layers.

Esempio cucina: 10 m² with a 400 lx target needs about 4000 lm. With 800 lm per 8W spot, that is about five spots. In practice, the worktop may still need under-cabinet lights, LED strips or carefully placed spots. A layered concept is often best: spots provide general light, LED strips add direct light on the work surface.

5Valori indicativi per stanza: 6W o 8W?

At the same target illuminance, 6W and 8W lead to different planning approaches. 8W spots need fewer light points and can create more depth and contrast. 6W spots usually need more light points but create calmer, more even illumination. Both approaches can be correct.

6Caso speciale 81061M04: perché 4W+4W non è automaticamente uno spot 8W normale

The TILLUME Expert 81061M04 is a special 4W+4W Tunable White spot with 2200–6500K. It should not be planned as a general 4W spot for small rooms and not as a conventional 8W spot.

This behaviour must not be transferred to other TILLUME Tunable White spots. Other 6W+6W or 8W+8W models are not automatically intended to run both channels permanently at full power.

7Progettazione del sistema 24V: alimentatore, controller e riserva

In a 24V LED spot system, planning does not end with watts per spot. 24V DC power supply, controller channel, cable length and spot must fit together.

Total spot load = number of spots × watts per spot
Recommended PSU power ≈ total load × 1.2

That equals about 20% reserve. A blanket 50% reserve is usually not required in normal projects and can lead to oversized power supplies. A 24V DC power supply should still not be operated permanently above its rated power.

TILLUME 24V power supplies offer two relevant advantages: adjustable output voltage to compensate realistic cable losses in correctly planned installations, and internal design reserve at rated load. This does not mean the rated power may be exceeded permanently; it means the installation has more practical tolerance for cable losses and operation at nominal load.

Also check: maximum power per LED controller channel, number of channels for Tunable White, PWM frequency and dimming behaviour, cable length, cable cross-section, room groups and whether the Tunable White controller uses Wattage Balance, constant power or a special mode such as MDT AKD-0424R Max wattage output.

8Caduta di tensione e tensione minima in ingresso

With longer 24V cable runs, total power is not the only issue. The input voltage directly at the spot also matters. Every cable causes voltage drop. If too little voltage reaches the end, a poorly planned 24V system may become visibly dimmer.

TILLUME 24V LED spots contain internal constant-current regulation. As long as the input voltage at the spot does not fall below the specified minimum, the internal driver can supply the LED stably. This makes the system more tolerant of realistic cable losses, but it does not replace correct planning of cable cross-section, cable length and power supply.

9Expert o Master: la luminosità non è l’unica differenza

Master is not simply “brighter”. The better reason for Master is light quality: stronger colour rendering, a smoother spectrum and stable thermal behaviour, especially with wood, food, skin tones and textiles. Relevant spot families can be found in the 24V LED Spots Expert Collection.

10Errori di progettazione frequenti

• Errore 1: 8W is always better than 6W. 8W gives more reserve and needs fewer points, but in small rooms it can cause glare or islands of light. 6W with more points often looks calmer and more even.
• Errore 2: choosing spots only by watts. Watt is electrical input. Planning needs lumen, target lux, beam angle, room area and light distribution.
• Errore 3: planning a cucina like a soggiorno. Cucinas and work surfaces often need higher lux values and additional functional light such as LED strips.
• Errore 4: treating 4W+4W as a normal 8W spot. With 81061M04, usable output depends strongly on controller logic.
• Errore 5: choosing the PSU too tightly. A 24V DC supply should not run constantly at its limit; about 20% reserve is a better practical rule.

11Checklist decisionale

• Quale superficie e quale livello lux target sono previsti?
• Are the surfaces bright or dark?
• How high is the ceiling?
• Should the spot provide general light, zone light or accent light?
• How many spots fit mechanically and visually into the ceiling?
• Is Fixed CCT with dimming enough or is Tunable White required?
• How many lumens does the spot deliver in the desired colour-temperature range?
• How much power can the controller channel provide?
• How large must the 24V DC power supply be with about 20% reserve?
• How long are the cable runs and what cable cross-section is used?
• For 81061M04: is MDT AKD-0424R Max wattage output really used?

12FAQ