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Table 11 Combinations of color temperature blue (CTB), plus green (PG), and neutral density (ND) photoselective filters that best reflect moderate and foliar shade spectral motifs

From: Layering contrasting photoselective filters improves the simulation of foliar shade

Foliar shade simulation

Filter combination

Manufacturer (Model#)

R:FRa

B:Gb

Bluec

Greend

Rede

PPF reductionf

UV-A PFg

     

%

µmol m−2 s−1

Moderate

1/4 CTB + 

Rosco Cinegel (#203) (LEE Filters #203)

       

0.30 ND

Rosco e-colour + (#3402) (LEE Filters #209)

0.35 (0.42)h

1.09 (0.97)

36.6 (33.0)

35 (36.0)

28.4 (31.0)

69.3 (66.0)

23.9 (16.3)

1/2 CTB + 

Rosco Cinegel (#202) (LEE Filters #202)

       

0.15 ND

Rosco Cinegel (#3415) (LEE Filters #298)

0.34 (0.42)

1.25 (1.18)

40.6 (39.7)

33.7 (34.0)

25.7 (26.3)

65.3 (61.3)

30.7 (21.9)

Deep

1/4 PG + 

Rosco e-colour + (#3316) (LEE Filters #246)

       

0.60 ND

Rosco e-colour + (#3403) (LEE Filters #210)

0.26 (0.29)

0.74 (0.64)

27.7 (23.6)

40.7 (39.7)

31.6 (36.7)

83.0 (81.7)

7.1 (5.6)

1/2 PG + 

Rosco e-colour + (#3315) (LEE Filters #245)

       

0.60 ND

Rosco e-colour + (#3403) (LEE Filters #210)

0.22 (0.26)

0.62 (0.56)

25.7 (22.7)

43.3 (42.0)

31.0 (35.3)

84.3 (83.7)

4.3 (4.7)

1/8 CTB + 

Rosco Cinegel (#218) (LEE Filters #218)

       

1/2 PG + 

Rosco e-colour + (#3315) (LEE Filters #245)

       

0.60 ND

Rosco e-colour + (#3403) (LEE Filters #210)

0.17 (0.20)

0.68 (0.60)

27.7 (24.4)

38.3 (42.3)

24.3 (33.3)

87.3 (85.3)

3.9 (4.7)

1/4 CTB + 

Rosco Cinegel (#203) (LEE Filters #203)

       

1/2 PG + 

Rosco e-colour + (#3315) (LEE Filters #245)

       

0.60 ND

Rosco e-colour + (#3403) (LEE Filters #210)

0.14 (0.18)

0.75 (0.65)

30.5 (26.7)

42.5 (42.0)

27 (31.3)

89

(86.3)

3.8 (4.0)

1/2 CTB + 

LEE Filters (#202)

       

1/2 PG + 

LEE Filters (#245)

       

0.60 ND

LEE Filters (#210)

0.13

0.78

31.6

40.7

27.7

89.30

3.30

  1. Moderate foliar shade can be described as shade that exhibits a B:G ratio above 1.0 (36–40% blue PPF and 35% green PPF), a R:FR ratio that is typically ≥ 0.30, and reductions in PPF between 70–90%. Deep foliar shade can be described as shade that exhibits a B:G ratio below 0.80 (20–30% blue PPF and ≥ 40% green PPF) a R:FR ratio that is typically ≤ 0.20, and reductions in PPF ≥ 95%
  2. aR:FR = 655–665/725–735
  3. bB:G = 420–490/500–570
  4. cBlue = Percentage of PPF between 400 and 499 nm relative to total PPF
  5. dGreen = Percentage of PPF between 500 and 599 nm relative to total PPF
  6. eRed = Percentage of PPF between 600 and 700 nm relative to total PPF
  7. fPPF reduction = Percent reduction in PPF relative to full sun
  8. gUV-A PF = Photon flux between 340 and 399 nm
  9. hData for LEE Filters combinations are in parentheses
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Plant Methods

ISSN: 1746-4811