Influence of Gap Size and Position within Gaps on Light Levels

Table 1

Results of the Tukey-Kramer post-hoc test for both methods (hemispherical photographs and instantaneous measurements) and gaps of different ratio: (a) small gaps with D/H ratio ≤0.5, (b) medium gaps with D/H ratio =1±0.25, and (c) large gaps with D/H ratio ≥1.5. Note. Positions with different letters indicate significant differences at 𝑃<.05.

(a) Small Gaps

Methods⧵positions	0	0.25	0.5	0.75	1	1.25
Hemispherical photographs	CD	D	BCD	AB	A	ABC
Instantaneous measurements	C	C	ABC	A	AB	BC

(b) Medium Gaps

Methods⧵positions	0	0.167	0.333	0.5	0.667	0.833	1	1.167	1.333
Hemispherical photographs	C	BC	ABC	ABC	A	A	AB	ABC	ABC
Instantaneous measurements	D	D	BCD	ABC	AB	A	A	CD	CD

(c) Large Gaps

Methods⧵positions

0

0.125

0.25

0.375

0.5

0.625

0.75

0.875

1

1.125

1.25

1.375

Hemispherical photographs

E

CDE

ABC

AB

A

A

ABC

ABC

BCD

DE

E

DE

Instantaneous measurements

B

AB

A

A

A

A

A

A

AB

AB

B

B