Well your asking the same question I have been searching for the last few days Im intrested in adding supplemental LED to my 4x4 tent With a 600 watt cool tube an as of now I have 3 option in my price range
This seems to be the best priced wattage an output not to sure on the purple spectrum but it should do pretty well in both veg/flower
Option 2 - 315$ for me.is a ds100 and at 300"$ and not cheap but a quality 100 watt light that is good for flower veg an clones wich makes it very useful all though
Option 3 280$ free shipping for me - california light works solar flare bloom booster wich I honestly think will wotk best for what I need but why buy this when the advanced ds100 offers more functionability or the apollo purple sun offers 3x the strength as both the lights im considering an they must be fairly new cant find anyone who has expierience with them yet except those somewhat cheezy fake lookin reviews on amazon! I actually was going.to order this light yesterday but didnt make it to the bank to depoist funds! Hope it will be a great supplemental light with other functionality for veggin etc.next time around!
Hey atomic, I've been looking into LEDs recently as well, but still have multiple questions. So take this as a grain of salt. Or whatever that saying is.
The DS100 looks like a quality light, and was actually going to invest in one, until I saw this video. If sound/stealth is not a concern, maybe it's not a bad light. But it's also $300. And it sounds louder than any inline fan I've seen around here.
http://www.youtube.com/watch?v=GXx7TZNoQF8
I haven't looked into COB LEDs or the solar flare, but the solar flare looks pretty badass. If you're willing to drop some dough, maybe take a look into the A51 RW75 light, or any of the hans panels? And I've heard decent things about BlackDog LEDs as well. Oh and I don't think the COB LED will actually hit the 300W mark.