The bright spotlights of Baselworld 2015 lit up a plethora of eye-catching watches of every shape, color, and complication. However, it was only when the lights were turned down or off that a few of the timepieces showed that their dark sides were actually quite bright.

Here are seven lume-heavy watches from Patek Philippe, Romain Jerome, Chopard, Valbray, Bell & Ross, Bulgari, and Glashütte Original that caught our eyes when the lights were dimmed way down low.

Patek Philippe Calatrava Pilot Travel Time Reference 5524

The Patek Philippe Calatrava Pilot Travel Time Reference 5524 was one of the most talked about watches from Baselworld 2015 . . . and had one of the brightest lumes

The internet was abuzz with heated debate over whether Patek Philippe should have launched a pilot’s watch at all, but not so much on whether the Calatrava Pilot Travel Time Reference 5524 is a good watch regardless of the brand name on the dial. One thing that’s not debatable is the high legibility of the indications both by day and by night.

Quick Facts Patek Philippe Calatrava Pilot Travel Time Reference 5524
Case: 42 x 10.78 mm, white gold
Movement: automatic Caliber CH 324 S C FUS with Gyromax balance and Spiromax (silicon) balance spring; Patek Philippe seal
Functions: hours, minutes, sweep seconds; date, second time zone, day/night indicators for both local and home time
Price: $47,600

Romain Jerome Batman-DNA

The Romain Jerome Batman-DNA shines the bat signal at night

Romain Jerome celebrates the 75th anniversary of DC Comics’ Batman by paying tribute to Gotham City’s most famous superhero with this Dark Knight-inspired Batman-DNA model. Luminous bat signal included when the lights go down.

Quick Facts Romain Jerome Batman-DNA
Case: 46 mm, black PVD-coated stainless steel
Movement: automatic Caliber RJ001-A (not in-house)
Functions: hours, minutes
Limitation: 75 pieces
Price: $18,500 / 14,950 Swiss francs / €14,950

Valbray Oculus V.01 Chrono Argentique

The lume of the Valbray Oculus Chrono lights up the night sky, but only when the dial’s “aperture” is open

Valbray’s party trick is that its collection watches contain an element that allows the dial to open and close like a camera aperture to reveal additional displays or mechanisms. In the case of the Oculus Chrono, though, opening the dial reveals a sunburst of lume and light as well.

Quick Facts Valbray Oculus V.01 Chrono Argentique
Case: 46 mm, DLC-coated titanium, diaphragm system comprising 16 blades on bezel that open and close like a camera aperture
Movement: automatic chronograph movement
Functions: hours, minutes; chronograph
Limitation: 36 pieces
Price: €15,000

Bulgari Black Sapphire Tourbillon

The Bulgari Tourbillon Saphir Ultranero looks almost like a spacecraft landing in the dark

A tourbillon in a black titanium and sapphire crystal case should inherently be spectacular by day, but Bulgari has ensured that the Tourbillon Saphir Ultranero looks just as good, if not better, in the dark.

Quick Facts Bulgari Black Sapphire Tourbillon
Case: 53 mm, DLC-coated titanium and sapphire crystal with Super-LumiNova-coated markers
Movement: manually wound, skeletonized manufacture caliber with sapphire crystal base plate and tourbillon, 70 hours power reserve, 21,600 vph
Functions: hours, minutes
Limitation: 30 pieces
Price: 200,000 Swiss francs

Glashütte Original Senator Observer

Glashütte Original is known for practical timepieces, and this Senator Observer is highly legible both day and night

While superficially looking like a pilot’s watch, the Senator Observer by Glashütte Original is actually styled after an observation or deck watch, which was used by navigators at sea. The bright lume on this model should make sailing by night a breeze.

Quick Facts Glashütte Original Senator Observer
Case: 44 mm, stainless steel
Movement: automatic Caliber 100-14, 55 hours power reserve
Functions: hours, minutes, small seconds; date, power reserve indication
Price: $11,800 (strap), $13,300 (bracelet)

Chopard Happy Fish

In the light this looks like a normal member of the Chopard Happy Diamonds line, but in the dark a larger glowing fish appears, really making the observer “happy”

This multi-faceted métiers d’art timepiece from Chopard possesses a glowing secret that is only visible when the lights go down: a playfully poetic fish swims out from behind a dark reef to brighten up anyone’s day.

Quick Facts Chopard Happy Fish
Case: 36 mm, rose gold, bezel set with brilliant-cut diamonds in three sizes
Movement: automatic caliber
Functions: hours, minutes, sweep seconds
Dial: snow-set with blue sapphires, mother-of-pearl fish engraved using bas-relief technique, red jasper eye, hand-applied gold leaf, seven mobile luminescent diamonds
Limitation: 25 pieces, only available in Chopard boutiques and corners
Price: 48,700 Swiss francs

Bell & Ross BR 01 Skull Bronze

The Bell & Ross Skull looks darkly menacing by day, but comes out to play night

This may remind you of a pirate, but rest assured that this skull-themed BR 01 from Bell & Ross  is firmly rooted in the air (as in pilot, not pirate!). The extreme lume on the trendy skull ensures that it will be seen even on the darkest Halloween night.

Quick Facts Bell & Ross BR 01 Skull Bronze
Case: 46 mm, bronze
Dial: black with photoluminescent skull
Movement: automatic Caliber BR-CAL.302
Functions: hours, minutes
Limitation: 500 pieces
Price: $6,900