When it comes to the installation distance of plant lights, many people will blurt out 30 cm or 45 cm. In fact, this statement is not rigorous.
The amount of care required by each plant is different, and this data is generally measured by DLI (Daily Light Integral).
It is converted to the familiar PPFD as follows:
DLI = mol/㎡/day
PPFD = umol/㎡/second
DLI = PPFD x 3600s x lighting hours / 1000000
PPFD = DLI x 1000000/ lighting hours / 3600s
Assuming that the DLI required by a plant is 40 mol/㎡/day, and the daily light time must reach 12 hours, then its PPFD must reach:
925.92 umol/㎡/second = 40*1000000/12/3600
This means that the grow light must be installed in a place where 925.92PPFD can be obtained.
If your plant light PPFD is not high enough, the easiest way is to shorten the distance between the light and the plant to get a higher PPFD.
But one thing to note is that most of the current Led Grow Lights have a structure similar to the following:
This also means that the closer the Led Grow Light is to the plant, the more focused the light (especially the special spectrum such as deep red), and as a result, only a small part of the plant can absorb the special spectrum, resulting in extreme spectral imbalance. Therefore, it is impossible to obtain infinite PPFD by continuously shortening the installation distance of the grow light.
Ultra Plant's ALL-IN-ONE Technology solves this problem, each LED chip can emit a full spectrum including White Light, Deep Red, Far Red, UV, ensuring that no matter how the distance is adjusted, every The same spectrum can be obtained for all parts.
Basing on that, we can achieve a higher Maximum PPFD than most LED Grow Lights.
