I just upgraded to an 8x8 tent myself and just bought another light of the one I already had lol. Running il8X 670W. Its running pretty good, maybe upgrading to a 1000W after 2 or 3 batches.
I was on the fence like you as well, get 2 HID or one LED. I tried to read all about and convinced myself that even tough its a bit more expensive LEDs would be better. The options I looked at were 2 1000W HPS-MH or 1 iL8X from Iluminar. I decided on the iL8x and glad I made that call. Make sure...
Check out iluminar lighting! They have amazing customer service and the sales guys are very helpful. They helped me a lot to get my setup going and right now its going super good. Checkem out forsure
Thats a neat setup you got there. Like they say, if it aint broke, dont fix it. in the case you would like to change lights though, I would recommend the iL8x 670W. Covers the whole spectrum of light and is dimmable for you to adjust, check it out!
I would suggest looking for some lights that offer TRUE watts. They may go up in price a little bit but its worth the squeeze really. I was on the fence on how much I should spend on one light, so I looked through a lot of options and landed on the iL8x. Not expensive for the quality and true...
I think one of the best lights for this price is iluminars 1000W HPS-MH. For the 4x4 tent you have this would be excellent, you should definitely check it out!
Completely agree with the other guys. Be careful with the quality and the reputation on the sites you buy from. I would suggest iluminar iL8x. Its one of the best on the market right now and its not expensive. For your 4x4 tent this will be perfect and the good thing is, that is dimmable, so...