PPFD Maps

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	AA
1	PPFD measurements taken with FutureHorti PPFD Meter in umol/m^2/sec																				PINK R:FR:		2.25:1
2	Light Colour Measures were taken using Google Pixel 7 phone and "Photone - Grow Light Meter" App
3	Distance from light to sensor is vertical distance from horizontal plane at bottom of light to horizontal plane at top of sensor
4	Back shelf is against a reflective white PVC wall. Ends and front are open. The left side of the shelf is close to a window behind it.
5	Light Mapping for 42W Full Spectrum (Yellow); Model INWT80421265Ec										R:FR: ~3.5:1
6	Light Set up:		2 x 42W Full Spectrum (Yellow); Model INWT80421265Ec WITH both reflector shields
7	Colour (K):		5500 - 5800
8	Light Spacing:		30cm apart; 11cm from shelf edge; 15 cm from shelf centre
9	Measurements (in umol/m^2/s):
10	Distance from sensor (cm): 24								Distance from sensor (cm): 14.5								Distance from sensor (cm): 7.5
11			Scale:
12			75	95	115	130	145	160
13			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.
14	Back	53 cm 21"	93	134	140	140	86	119	Back	53 cm 21"	118	162	163	164	112	144	Back	53 cm 21"	138	176	181	183	136	163
15	Middle		114	149	156	149	97	133	Middle		95	141	144	139	101	124	Middle		31	22	21	20	13	21
16	Front		83	119	119	118	77	103	Front		106	153	146	155	108	134	Front		133	159	160	160	128	148	Overall Average:
17	Average:		118.3								133.8								110.7						120.9
18			Min:	77	Max:	156					Min:	95	Max:	164					Min:	13	Max:	183
19	Overall: Light intensity in the middle diminishes as you increase the height of the sensor, which represents the top of the crop canopy. The reflector shield prevents the light from reaching the middle of the shelf as the crop gets higher and cuts it off drastically in the middle at the highest measure - which represent the point of crop harvest maturity. The 14.5 cm height here represents the highest overall average between the measures of all three two-light maps (see others below). The back-shelf measurements here also represent the highest averaae (Note: the shelf is backed by a reflective white wall). The 7.45 cm from light has both the higest and lowest measures of the three two-light maps. Front-shelf values are always lower than back-shelf values due to lower reflectivity; the difference increases the further from the lights you get. Highest overall average light values.
20	Main Take Aways: Middle diminishes severely with height; Directly under light is most intense. Two lights with reflectors has both high and low extremes. Two reflectors are great for crops that get no closer than 14.5 cm to the lights. May not be ideal for taller rops.
21	Light Set up:		2 x 42W Full Spectrum (Yellow); Model INWT80421265Ec - NO reflector shield
22	Colour (K):		5500 - 5800
23	Light Spacing:		30cm apart; 11cm from shelf edge; 15 cm from shelf centre
24	Measurements (in umol/m^2/s):
25	Distance from sensor (cm): 24								Distance from sensor (cm): 14.5								Distance from sensor (cm): 7.5
26			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.
27	Back	53 cm 21"	80	119	123	123	72	103	Back	53 cm 21"	99	136	137	140	95	121	Back	53 cm 21"	124	156	158	162	121	144
28	Middle		83	109	108	103	68	94	Middle		89	109	107	106	71	96	Middle		74	77	73	74	57	71
29	Front		72	95	96	96	63	84	Front		75	107	107	110	79	96	Front		107	131	126	133	110	121	Overall Average:
30	Average:		94.0								104.5								112.2						103.6
31			Min:	63	Max:	123					Min:	71	Max:	140					Min:	57	Max:	162
32	Overall: Averages here are lower than those above in the lowest two measures (24 cm and 14.5 cm from lights) but higher in the highest measures (7.5 cm from lights). Increased values in the back of the shelf due to reflectivity from the (white) back wall as above. Middle values here are much higher than middle values above at the 7.5 cm distance from lights). Light density average does not change much between sensor distance from lights relative to the other two-light setups. Would give them most consistent of all the two-light set ups.
33	Main Takeaways: Lowest overall average suggesting the most loss of light and thus the most inefficient use of light overall.
34	Light Set up:		2 x 42W Full Spectrum (Yellow); Model INWT80421265Ec - OUTER reflector shields ONLY
35	Colour (K):		5500 - 5800
36	Light Spacing:		30cm apart; 11cm from shelf edge; 15 cm from shelf centre
37	Measurements (in umol/m^2/s):
38	Distance from sensor (cm): 20								Distance from sensor (cm): 14.5				14.5				Distance from sensor (cm): 7.5				7.5
39			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.
40	Back	53 cm 21"	80	115	120	120	74	102	Back	53 cm 21"	82	121	123	122	84	106	Back	53 cm 21"	118	132	147	158	120	135
41	Middle		101	151	153	148	104	131	Middle		97	143	143	137	84	121	Middle		63	82	83	80	51	72
42	Front		74	108	115	110	72	96	Front		85	127	126	125	86	110	Front		113	159	149	140	113	135	Overall Average:
43	Average:		109.7								112.3								113.9						112.0
44			Min:	72	Max:	153					Min:	82	Max:	143					Min:	51	Max:	159
45	Overall: The 20 and 14.5 cm values are lower than the two-reflector average but the 7.5 cm values are higher. Back-shelf values higher than front-shelf values. Best light density at the 7.5 cm distance from lights
46	Main take aways: Best values for taller crops
47	Two-Light Mapping Overview: The two-reflector setup had the highest average densities and the no-reflector set up had the lowest values. The outside-reflectors set up had the best middle values at the closest measures to the lights. Suggestions: Two-reflector light setup offers the best light density overall; for taller crops, you could remove the inside reflectors as the crop gets taller (closer than 14.5 cm to the lights) to improve light density to the middle of the canopy. Additional Notes: Adjusting the position/angle of the reflectors would change these values; Changing the angle of the lights with the outer-reflector set up could also change values to be more favorable.
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50	Light Set up:		1 x 42W Full Spectrum (Yellow); Model INWT80421265Ec WITH reflector shield
51	Colour (K):		5500 - 5800
52	Light Spacing:		Centre of shelf
53	Measurements (in umol/m^2/s):
54	Distance from sensor (cm): 2								Distance from sensor (cm): 11.5								Distance from sensor (cm): 5.5
55			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.
56	Back	53 cm 21"	46	42	43	43	25	40	Back	53 cm 21"	16	14	7	6	4	9	Back	53 cm 21"	14	4	1	1	1	4
57	Middle		118	143	145	143	84	127	Middle		211	228	230	240	161	214	Middle		460	470	466	498	400	459
58	Front		40	51	49	47	28	43	Front		12	10	9	9	6	9	Front		9	3	2	2	2	4
59	Average:		69.8								77.5								155.5
60			Min:	25	Max:	145					Min:	4	Max:	240					Min:	1	Max:	498
61	Overall: Light intensity in the middle increases as you increase the height of the sensor while deteriorating severaly in the front and back. May be too intense at the highest point. We do not see a reflecitivity advantage on the back wall. AT the 11.45 cm and 5.5 cm sensor distances the sensor barely receives any light at all. Main Take Aways: Like the two-light two-reflector set up above, this is a set up of extremes - but even more so.
62	Light Set up:		1 x 42W Full Spectrum (Yellow); Model INWT80421265Ec - NO reflector shield
63	Colour (K):		5500 - 5800
64	Light Spacing:		Centre of shelf
65	Measurements (in umol/m^2/s):
66	Distance from sensor (cm): 21								Distance from sensor (cm): 11.5								Distance from sensor (cm): 5.5
67			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.			120 cm; 47.5"					Avg.
68	Back	53 cm 21"	38	47	46	44	25	40	Back	53 cm 21"	33	41	38	36	22	34	Back	53 cm 21"	28	22	20	19	12	20
69	Middle		84	107	107	103	69	94	Middle		141	158	154	153	114	144	Middle		244	264	271	270	233	256
70	Front		31	37	36	35	23	32	Front		27	30	30	29	19	27	Front		18	18	16	15	10	15
71	Average:		55.5								68.3								97.3
72			Min:	23	Max:	107					Min:	19	Max:	158					Min:	10	Max:	271
73	Overall: The single light set up without the reflector does a much better job at distributing the light evenly across the growing space - reducing the intensity in the middle and increasing the intensity in the front and back at the higher sensor measures. Light density in the middle is much lower and less likely to damage plants. If growing with just one light, then it makes sense to not use reflectors, except maybe for the first day or two. For taller crops, no reflectors will definitely be better.
74	One-Light Mapping Overview: The reflector causes strong extremes with the single light, especially closer to the lights. Ideally, one-light grows would not use a reflector.
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