The Domus THOR-PRO-15 Reflector is a replaceable beam-shapingreflector for the 15W THOR-PRO head available at 15,24, 45 and 60.

The beam angle is not fixed and we said otherwise one batch ago

• The THOR-PRO head ships with a 36 reflector, and its datasheet lists15, 24, 36, 45 & 60 (36 Standard).
• WE READ 36 Standard AS THE ONLY OPTION AND WROTE THAT THE BEAMANGLE WAS FIXED AT PURCHASE. It means the reflector supplied.
• THIS PRODUCT IS THE PROOF: reflectors are sold separately, at their own SKU, perangle and the same is true for the 23W and 32W heads.
• THE CORRECTION MATTERS BECAUSE THE ADVICE WAS EXPENSIVE. We suggestedbuying a mix of differently-angled heads. You do not need to: buy one specification ofhead and a handful of reflectors.

What a reflector actually changes, and what it does not

• A reflector is a shaped cone sitting in front of the LED. Its geometrydetermines how tightly the light is gathered.
• THE LUMENS DO NOT CHANGE THE CONCENTRATION DOES. The same1,300 lumens through a 15 reflector produces a small intense pool; through 60 it produces a wide softone. Illuminance on the target rises sharply as the angle narrows, because the samelight covers less area.
• ROUGHLY, FROM A 3m CEILING TO A 1m SURFACE:
  • 15 a pool about 0.5m across. A single object.
  • 24 about 0.9m. A mannequin, a plinth, a smallbay.
  • 36 about 1.3m. A shelf bay or a table.
  • 45 about 1.7m. A counter run.
  • 60 about 2.3m. General lighting.
• WHAT A REFLECTOR CANNOT DO IS FIX A BAD MOUNTING POSITION. Narrowing thebeam makes a mis-aimed fitting miss more precisely.

How to order them, now that the angle is changeable

• THE SENSIBLE ORDER IS ONE SPECIFICATION OF HEAD PLUS A SPARES BOX. Take the 36 heads as supplied, then a handful of 24 reflectors for feature positions and a few60 for any area that turns out to need washing rather than accenting.
• THAT IS CHEAPER AND MORE FLEXIBLE THAN SPECIFYING ANGLES PER POSITION ATFITOUT because the display will move, and the right angle for a position inMarch is not the right one in September.
• KEEP THE SPARES ON SITE RATHER THAN IN AN OFFICE. A reflector that istwenty minutes away gets used; one that needs ordering does not, and the display stays wrong.
• Tell us the number of heads and how many feature positions the space has, and we willsuggest a spares mix.

Its record and its datasheet both describe the head, not the reflector

• The datasheet attached to this listing publishes 15W,1,2001,300 lumens, CRI 90 and three colour temperatures. Those belong to the head. A reflector has a shape, amaterial and an angle.
• Its record also publishes bulb_type = Built-in LED. Measured across the ten optical accessories in this catalogue, 10 of 10 publishat least one electrical field and two publish a voltage. It is the same template defaultfound on brackets, mounting plates and panel frames.
• WHAT IS NOT PUBLISHED IS WHAT A BUYER WOULD WANT: the reflector’s material and finish, andwhether it changes the fitting’s appearance from below. Ask us if the visible aperturematters to the scheme.

What is published

Where it works

• As a spares box on a retail fitout re-optic as displays move.
• Feature positions 24 or 15.
• Areas that turn out to need washing 60.
• Not as a fix for a bad mounting position it misses more precisely.
• Not on 23 or 32W heads each size has its own.

Specifying it

Replaceable beam-shaping reflector for THOR-PRO-15 heads. Available at 15, 24, 45 and 60;36 is supplied with the head. THIS PRODUCT CORRECTED OUR OWN ADVICE. One batch earlier we wrote that the THOR-PRO beam anglewas “fixed at purchase” we had read the head sheet’s “(36 Standard)” as meaning the only option, whereit means the reflector SUPPLIED. Reflectors are sold separately, per angle, for all three head sizes. THEADVICE WAS WRONG IN THE EXPENSIVE DIRECTION: we suggested buying a mix of differently-angled heads, and youdo not need to. BUY ONE SPECIFICATION OF HEAD AND A SPARES BOX OF REFLECTORS.

Supplied and supported by Lights For You.

Questions

Can I change the beam angle after installation?

Yes that is what this product is for. The head ships with a 36 degree reflector and reflectors are sold separately at 15, 24, 45 and 60 degrees. We got this wrong one batch earlier: we read the head sheet’s “(36 Standard)” as meaning the only option, where it means the reflector supplied, and wrote that the beam angle was fixed at purchase. It is not.

Does that change how I should order?

It should. We had suggested buying a mix of differently-angled heads, which is the expensive way round. Buy one specification of head the 36 degree as supplied and a spares box of reflectors: a handful of 24 degree for feature positions and a few 60 degree for any area that turns out to need washing rather than accenting.

Why is that better than specifying angles per position?

Because the display will move. The right angle for a position in March is not the right one in September, and a fitout with angles fixed per position loses the flexibility that track was bought for. Keep the spares on site rather than in an office a reflector twenty minutes away gets used, one that needs ordering does not, and the display stays wrong.

Does a narrower reflector make it brighter?

On the target, yes; in total, no. The lumens do not change the concentration does. The same 1,300 lumens through a 15 degree reflector produces a small intense pool and through 60 degrees a wide soft one, so illuminance on the target rises sharply as the angle narrows because the same light covers less area.

What pool size will I get?

From a 3m ceiling to a 1m surface, roughly: 15 degrees gives about 0.5m across, 24 about 0.9m, 36 about 1.3m, 45 about 1.7m and 60 about 2.3m. Choose from the object rather than the room.

Will a narrow reflector fix a poorly placed fitting?

No it will make it miss more precisely. Narrowing the beam concentrates the light, which is unforgiving of aim. If a position is wrong, move the head; that is what track is for.

Why does the listing show wattage and lumens?

Because the attached datasheet is the head’s. It publishes 15W, 1,200 to 1,300 lumens, CRI 90 and three colour temperatures, and those belong to the head a reflector has a shape, a material and an angle. The record also carries bulb_type, which a reflector has no business having: across the ten optical accessories in this catalogue, all ten publish at least one electrical field.