Your plants deserve more than a windowsill.
Window light≈100 PPFD
TerraSens light≈500 PPFDTerraSens is a grow light for indoor plants: five times the light of a windowsill, without the purple glare of typical grow lamps. Designed and made in Croatia.
The design stays under wraps until it's protected. Followers see it first.
The light comes from specially selected LEDs: deep red plus warm-white full spectrum. PPFD (photosynthetic photon flux density) measures how much of the light plants use for photosynthesis actually reaches the leaf, in µmol per m² per second. Measured at leaf height with the Photone app.
Next result
02'Purple Ball' basil
First lampsQ1 2027
Same cultivar. Same pot. The light did this.
Hypothesis 01
'Red Rubin' basil only shows its deep purple under strong light. We're testing whether the selected LEDs and their arrangement in TerraSens deliver enough of it, on a kitchen shelf, with no greenhouse.
Next result
02'Purple Ball' basil
First lampsQ1 2027
Grow tests · in progress
Three plants that can't fake the right light.
We picked plants that show straight away when the light is wrong. Every test result is published here.
- 01
'Red Rubin' basil
Ocimum basilicum 'Red Rubin'
Turns deep purple only with enough light. At ≈100 PPFD it stays green with purple veins; at ≈500 it goes dark.
Result published
Read result 01 → - 02Coming soonPhoto with the result
'Purple Ball' basil
Ocimum basilicum 'Purple Ball'
Grows as a tight purple globe. Under weak light it stretches, falls apart and loses its colour.
Sown 9/23/2026
Result · mid-November
- 03Coming soonPhoto with the result
'Prairie Fire' chili
Capsicum annuum 'Prairie Fire'
Needs a lot of light to set fruit indoors. Our hardest test.
Result · December
The idea behind TerraSens
European, from the beech down to the soil.
TerraSens is not an import with a logo stuck on it. The lamp is designed, milled and assembled in Croatia, inside the European Union.
Every material is chosen twice: once for how it performs, once for what it leaves behind. Certified beech, a linseed-oil finish with no solvents, milled aluminium instead of moulded plastic, organic soil and organic feed for the plants we test on.
Certification is part of the design, not paperwork added at the end. That is the whole point: European design, European manufacturing, and an origin you can check for every part of it.
Bill of origin
Beech
European beech from controlled, sustainably managed forestry.
Finish
Rubio Monocoat, linseed-oil based: no solvents, 0% VOC.
Heatsink
Milled and anodised aluminium, sourced in Croatia. Not moulded plastic.
Soil
BioBizz — organic, no synthetic additives.
Feed
Organic fertiliser only.
Made in
Designed, machined and assembled in Croatia, EU.
EU
Designed and manufactured in the European Union.
CE
Conformity assessment before the first unit ships.
- RoHS
RoHS
Electronics without restricted substances.
- PEFC
PEFC
Beech from a PEFC-certified chain of custody.
These are the standards the design is built to. The signed declarations follow before the first lamps ship.
Grow tests
Follow every test, from seed to result.
The first lamps arrive in Q1 2027. Followers see the design first and get the result of every test: one email per test.