Shane From MIGROW does amazing work with testing and reviewing lights. I pulled all this information from his youtube channel and compiled it into a easy to view list to help you choose your next light. I plan on updating this list with current pricing of each light and overall wattage to help you further determine how you want to budget your grow. So here is the Current list from highest PPFD to lowest.
ThinkGrow Model H PPFD/Watt: 2.51 (630w @$1,350.00) $2.1/watt
Migrow Aray PPFD/Watt:2.42 ( 240w @$320.00) $1.3/watt
Gavita 1700 PPFD/Watt:2.4 (645w @$1,379.00) $2.1/watt
ChilLed Growcrafx x6 PPFD/Watt:2.39 (600w @$1,259.00) $2.09/watt
Lumatek Zeus 600w Pro PPFD/Watt:2.33 (600w @$994.00) $1.65/watt
Growers Choice E420 PPFD/Watt:2.32 (420w @$649.00) $1.54/watt
Photontek 600w pro PPFD/watt:2.29 (600w @$999.00) $1.6/watt
ARDEN EH500 PPFD/Watt:2.28 (500w @$800.00) $1.6/watt
Photontek 465w pro PPFD/watt:2.22 (465w @800.00) $1.72/watt)
HLG QB 288 v2 PPFD/Watt:2.21 (600w @$759.00) $1.26/watt
Atreum ara-20 PPFD/Watt:2.19 (180w @$249.00) $1.38/watt
Fluence Spydrx PPFD/Watt:2.17 (330w @$900.00) $2.7/watt
Bios Icarus Ti2 PPFD/Watt 2.17 (702w @1325.00) $1.88/watt
Chilled logic v2 PPFD/Watt:2.16 (104w @$120.00) $1.15/watt
Mammoth 10 bar PPFD/Watt:2.12 (800w @$1,069.00) $1.33/watt
Mars SP 3000 PPFD/Watt:2.1 (300w @$400.00) $1.3/watt
Optic 1 Cob PPFD/Watt:2.04 (54w @$129.00) $2.38/watt
Migrow cob PPFD/Watt:2.0
Alien Panel 2 PPFD/Watt:2.0
BavaGREEN 250w PPFD/Watt:1.99 (240w @$265.00) $1.1/watt
Spider Farmer SF1000 PPFD/Watt:1.96 (110w @$112.00) $1.01/watt
HLG qb96 elite PPFD/Watt:1.92
Viparspectra P1000 PPFD/Watt:1.89 (100w @$89.00) $0.89/watt
Plantminer S1 PPFD/Watt:1.89 (250w @$175.00) $0.70/watt
Gtools led bar PPFD/Watt:1.85
Electric Sky ES180 v2 1.83 ppfd/widband 2.0 ppfd (180w @$400.00) $2.2/watt
Sanlight s4w PPFD/Watt:1.81 (140w @$430.00) $3.07/watt
Mars SP250 PPFD/Watt:1.8 (230W @$259.00) $1.12/watt
OPtic 1 xL PPFD/Watt:1.76
Magnus ra350 PPFD/Watt:1.74
Crecer Lighting X100 PPFD/Watt:1.72 (100w @$200.00) $2/watt
Grow northern telus PPFD/Watt:1.66
Telos 0006 PPFD/Watt:1.66 (185w @$530.00) $2.8/watt
Mars TS 1000 PPFD/Watt:1.65 (150w @$140.00) $0.93/watt
Mars Hydro Cob PPFD/Watt:1.63 (105w @$200.00) $1.9/watt
Nextlight Mega PPFD/Watt:1.6
Secret Jardin bar light PPFD/Watt:1.55
Budmaster 2 goB6 PPFD/Watt:1.52
Gtools GLED 280 PPFD/Watt:1.5
California Lightworks 550 PPFD/Watt:1.5 (400w @$800.00) $2/watt
Aponuo 1000 PPFD/Watt:1.45 (200w @$82.00) $0.41/watt
CMH LEC PPFD/Watt:1.38
skyline MK2 PPFD/Watt:1.38 (200w @$350.00) $1.75/watt
Mars Hydro ECO PPFD/Watt:1.37
Mars Reflector PPFD/Watt:1.3
HPS Digital 600w PPFD/Watt:1.3
OPTIC 2 PPFD/Watt:1.23
MEIZHI R90 PPFD/Watt:1.23
PHilzon 600w PPFD/Watt:1.2 (100w @$75.00) $0.75/watt
Spectrumking 400+ PPFD/Watt:1.2
Roleadro cob PPFD/Watt:1.19 (200w @$100.00) $0.5/watt
KInd K5 XL750 PPFD/Watt:1.17
Agrotek PPFD/Watt:1.15
Spectrum king MLH PPFD/Watt:1.0
Rolandro 450w(140w) PPFD/Watt:1.0
VIpar spectra v300 PPFD/Watt:0.98 (**cry** I still have one of these)
VIparspectra 450w(200w) PPFD/Watt:0.94
Metal Halide 600w Dig PPFD/Watt:0.93
Lumi T5 PPFD/Watt:0.74
If you want detailed reviews for any of the lights listed with par maps they are all on MIGROW's youtube channel.