as example that sunraise light right here in its description, they say 1000w cause they use quote “15w” chips but even with their math 15x96 =1440w, but they say it replaces 500-600w of hps which is pure bull, actual rated watts is 165 and thats probably what its comparable due to the older chips architecture and build style thats been around for some time
LED: 96pcs - 15W LEDs
Replace :500W-600W HPS
using the Missyee 2 pack again
Actual Power 105W * 2
HPS Light Replaced 400W * 2
LED Chip Power 600W * 2
again BS rated is 105w times 2 units so 210w total the other numbers are just to confuse you, really a more accurate comparison is light output whether par, lux, or lumens, watts just tell you whats coming from the wall.
and that TMlapy “1000w” unit
Model Number: E1000
Actual Power: 178W±5%
so when you actually look at say the marshydro or spiderfarmer stuff which with the units i suggested being quite a bit more efficient than those above, probably makes a bit more sense.
But your 20"x36" tent is kinda an odd ball size and inorder to light it effectively the options are less.
Honestly get either the Marshydro sp-150, or two of there ts600 units, or two of HLG’s HLG 65 V2 units, any of those three options are what you should be looking at and the those prices are reasonable, id be looking at that first one though just cause its easier to hang one unit than two.
or like @beacher suggested if you have a bit of diy skills and a little electrical knowledge you can build your own light with bridgelux strips pretty easily and would probably end up being around $120-130usd just cause of a “trump tax” aka 25% on electronic parts made in china or elsewhere, but with that you would be getting a pretty decent light, im a little biased though as its what i run and i enjoy them.
But yeah that’s what i suggest and others here will probably tell you similar.
Just trying to set you up right and on proper footing to be successful