YOR - Lighting Resources - Watts per Square Foot Table

Find the available lumens per sq ft you want to use then read across to the type of bulb you have. The shaded area of the table marks the 5000-10000 lumen per square foot range, this is the range most growers use,

Watts/Sq Ft Needed To Produce The Available Lumens/Sq Ft For Standard Bulbs
Available Lumens per Sq Ft	Bulb Wattage																Available Lumens per Sq Ft
	1500	1000		600	430	400		250		175	100		70		40
	MH	M H	H P S	HPS	HPS	M H	H P S	M H	H P S	MH	M H	H P S	M H	H P S	4 foot Fluoro Gro	4 foot Fluoro cw/ww
33000	320	275	244	228	273	344	268										33000
32000	311	267	237	221	264	333	260										32000
31000	301	258	230	214	256	323	252										31000
30000	291	250	222	207	248	313	244										30000
29000	282	242	215	200	240	302	236										29000
28000	272	233	207	193	231	292	228		250								28000
27000	262	225	200	186	223	281	220		241								27000
26000	252	217	193	179	215	271	211		232								26000
25000	243	208	185	172	207	260	203		223								25000
24000	233	200	178	166	198	250	195		214								24000
23000	223	192	170	159	190	240	187		205								23000
22000	214	183	163	152	182	229	179		196								22000
21000	204	175	156	145	174	219	171	250	188								21000
20000	194	167	148	138	165	208	163	238	179								20000
19000	184	158	141	131	157	198	154	226	170								19000
18000	175	150	133	124	149	188	146	214	161								18000
17000	165	142	126	117	140	177	138	202	152								17000
16000	155	133	119	110	132	167	130	190	143								16000
15000	146	125	111	103	124	156	122	179	134								15000
14000	136	117	104	97	116	146	114	167	125	169							14000
13000	126	108	96	90	107	135	106	155	116	157							13000
12000	117	100	89	83	99	125	98	143	107	145							12000
11000	107	92	81	76	91	115	89	131	98	133							11000
10000	97	83	74	69	83	104	81	119	89	120							10000
9000	87	75	67	62	74	94	73	107	80	108		98					9000
8000	78	67	59	55	66	83	65	95	71	96	99	87					8000
7000	68	58	52	48	58	73	57	83	63	84	86	76					7000
6000	58	50	44	41	50	63	49	71	54	72	74	65		69		75	6000
5000	49	42	37	34	41	52	41	60	45	60	62	54	70	57		63	5000
4000	39	33	30	28	33	42	33	48	36	48	49	43	56	46		50	4000
3000	29	25	22	21	25	31	24	36	27	36	37	33	42	34	67	38	3000
2000	19	17	15	14	17	21	16	24	18	24	25	22	28	23	44	25	2000
1000	10	8	7	7	8	10	8	12	9	12	12	11	14	11	22	13	1000
	1500	1000		600	430	400		250		175	100		70		40 Fluorescent