Category	Details
Plant Species	Alstroemeria (cut-flowers)
Required PPFD (µMol m⁻²s⁻¹)	1 - 1.5
Type of Lamp	inc.
Annual Irradiance Period	mid Jan.-Feb.
Irradiance per Day (incl. daylight)	10 min. per half hour
Purpose and Method	Flower advancement
Required PPFD (µMol m⁻²s⁻¹)	40 - 50
Type of Lamp	HID
Annual Irradiance Period	Jan.-March
Irradiance per Day (incl. daylight)	14 hours
Purpose and Method	Flower advancement, better quality, increased production

PPFD for different Lamp types

The recommended irradiation level is expressed in µmol m⁻²s⁻¹ (PPFD). However, in practice, the irradiation unit lux is often still used. Therefore, the conversion from lux to PPFD is shown below. This conversion is not a constant but is dependent on light source, operating temperature, and amount of operating hours of the lamp.

• inc. - incandescent; 1000 lux is approx. 18 µmol m⁻²s⁻¹


• PL - PLE (compact fluorescent lamp); 1000 lux is approx. 13-14 µmol m⁻²s⁻¹


• TL - tubular fluorescent lamp; 1000 lux is approx. 13-14 µmol m⁻²s⁻¹


• HID - high-intensity discharge lamp (MASTER GreenPower, MASTER Agro or HPI-T Plus); 1000 lux is approx. 12-13 µmol m⁻²s⁻¹


• LED Please Vist Lux to LED PAR (PPFD) Calculator