Crescience PPFD Database
| Designation | Area | Height | Input power (socket) | Average PPFD | PPFD/performance [µmol/m²/J] | Homogeneity (min./max.) | Distribution (Map) | Driver |
|---|---|---|---|---|---|---|---|---|
| The Halo - FLUXengine x4 | 100 x 100 cm | 40 cm | 153 W | 329 µmol/m²s | 2.15 µmol/m²/J | 17% | XLG-150-M-AB | |
| The Triple Bar - FLUXengine x6 | 100 x 100 cm | 40 cm | 265 W | 560 µmol/m²s | 2.11 µmol/m²/J | 24% | XLG-240-M-AB | |
| FLUXengine x8 (old reference - LM301B) | 100 x 100 cm | 40 cm | 355 W | 632 µmol/m²s | 1.78 µmol/m²/J | 55% | 2x HLG-320H-C2800 | |
| FLUXengine x8 (old reference - LM301B) | 100 x 100 cm | 40 cm | 473 W | 821 µmol/m²s | 1.74 µmol/m²/J | 55% | 2x HLG-320H-C2800 | |
| FLUXshield Pro | 100 x 100 cm | 40 cm | 153 W | 289 µmol/m²s | 1.88 µmol/m²/J | 17% | XLG-150-H-AB | |
| FLUXshield Pro Red | 100 x 100 cm | 40 cm | 153 W | 316 µmol/m²s | 2.06 µmol/m²/J | 18% | XLG-150-H-AB | |
| LXC Dual FLUXshield Pro | 100 x 100 cm | 40 cm | 308 W | 584 µmol/m²s | 1.89 µmol/m²/J | 21% | 2x XLG-150-H-AB | |
| LXC Dual FLUXshield Pro Red | 100 x 100 cm | 40 cm | 308 W | 621 µmol/m²s | 2.01 µmol/m²/J | 21% | 2x XLG-150-H-AB | |
28 cm strip Samsung 660nm (6x LH351H) | 100 x 100 cm | 40 cm | 12.5 W | 23 µmol/m²s | 1.85 µmol/m²/J | 11% | - | LCM-25 (700 mA) |
APEXengine 660M (Mk II) | 100 x 100 cm | 40 cm | 11.5 W | 27 µmol/m²s | 2.38 µmol/m²/J | 11% | - | LCM-25 (1050 mA) |
The database is currently under construction. In the future more variations and kits will be added. If you would like to get a comparison value for your lamp, you can Contact and have them tested by us.
Why measure PPFD?
The most important factor when designing a LED system for horticulture is the performance of the fixture.
There are two approaches to this: Laboratory tests that integrate the photon output. These have the advantage of a high degree of standardization and thus enable a very objective comparison of different plant lamps. However, a high measured photon output in a Integrating sphere not necessarily that this luminosity is actually available for the plants in the area under cultivation. The indicated PPF values are therefore of a more theoretical nature.
We therefore perform standardized field tests and measure the photosynthetic photon flux density (PPFD) in a measurement grid. In this way we make visible how much light (PAR) actually reaches the plants and, above all, how the intensity is distributed.
The ultimate goal is not to whitewash - with our PAR test system we deliver minimum values which the user can exceed with a high probability in reality. Our test standards are transparent!
Test standard for PPFD measurements
HomeBox Ambient Q100, a widely used grow tent for indoor gardens Area: 100 x 100 cm = 1 m².
Future plans for larger setups: 120 x 120 cm and for smaller setups 60 x 60 cm
Light absorbing black theatre fabric. This ensures that hardly any reflection occurs - it is assumed that the leaf canopy absorbs almost all photons. This ensures that the measured values are very likely to be exceeded in real applications. However, compared to measurements on reflective floors, approx. 20% lower values are recorded.
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For better comparability, all plant lamps are suspended at a distance of 40 cm from the sensor surface and aligned as centrally as possible in the tent. Measurements are taken in a 10 cm grid. This allows the PPFD values to be recorded at 100 evenly distributed points (Homebox Q100).
Gradually we will also provide measurements for recommended heights where homogeneity or PPFD can be optimized
Apogee SQ-520, a widely used Quantum Meter that is appreciated by many users for its reliability and repeatability. The sensitivity reproduces the PAR spectrum from 400-700 nm quite well.
The power consumption is measured at the socket (input power of the driver). Electrical losses are therefore already taken into account. If possible, color channels outside the PAR range are switched off (concerns far red/infrared and UV radiation).
Have PAR tested!
We offer the PAR test of all lamps, third-party manufacturers are also welcome. If you do not need your plant lamp for about 10 days, you can send it to us so that we can perform the PPFD measurements.
In return, the sender - and all visitors to cre.science - will receive a recommendation for the ideal height and PPFD / PAR intensity with this model. Also NDL / HPS can be tested with us. Just take Contact with us.