I've been using a Mars TSW2000 for about a year now . . . a good light, did a great job in both flower and veg in a 3x3 tent, and I would recommend it all day for that size space.
My only complaint was the heat . . . I run an HLG Scorpion rspec in my flower room and it runs significantly cooler than the 300w Mars light. Driver on Mars light is often 110º F + . . . the bigger HLG light stays right at 90º F or under if dimmed. The Scorpion lights only require 12" hanging above canopy also, helps when dealing with lower ceiling heights.
Neither the driver or heatsink on the HLG are uncomfortable to touch with a bare hand . . . can't say that about the TSW2000.
My only complaint was the heat . . . I run an HLG Scorpion rspec in my flower room and it runs significantly cooler than the 300w Mars light. Driver on Mars light is often 110º F + . . . the bigger HLG light stays right at 90º F or under if dimmed. The Scorpion lights only require 12" hanging above canopy also, helps when dealing with lower ceiling heights.
Neither the driver or heatsink on the HLG are uncomfortable to touch with a bare hand . . . can't say that about the TSW2000.