I am getting ready to start a J here soon with the 240 watt 7 band...I have used them alone and in conjunction with hps/mh over the last couple years with great results...but like most anything compared with growing MJ...they have their place and usage as stated...if you growing for personal smoke...small space...minimal work/time....they will get it done for you used alone...if they(HTG brand) don't...you got other issues in the room/pot effecting a decent finish...are they better than?hps/mh?...some areas yes...some no...depends on your skills and set-up arrangements...what you looking for?....ease/quality/ yield?...remember...most strains quality/power/yield is in the genetic make-up and skilled work/ breeding programs/ parents/ etc...not the light source per say...but... if yield is your primary target...they can't compare as good or better in total yield to
hps when used alone just yet...but... in combination with or when they're used alone...there's some good things saved/produced in a lot of other areas that make them worth using... even with the minimal loss in yield I've seen in my using them...the off setting electric cost and work/equipment needed in other places when using the dreaded high heat HPS lights...makes them worthwhile to some peeps...I have no gripes or regrets with mine...they produce more than enough weed for me to consume/share personally, and allow me to get some great results in small spots with minimal envionmental issues...especially the dreaded heat issues that cause so many failures for peeps in the beginning...a 1000 watt hps won't produce good yields for anybody in too hot a room ,if everything else you're doing is absolutely perfect...and it is still using 1000 wasted watts...so you gain nothing if you simply can't control temps or have whats needed to do so...no different than controlling ph...don't do it right...you gonna get less yield...I've grown the same genetics with both types, alone and in combination, and the only thing I've lost was a little yield at the end...but the punch/quality of smoke was hardly changed if any at all..I've seen great weed grown with excellent results with a shop light,if your budget is tight...but the other things(like whats in the root zone for instance) are so much more important and harder to perfect than your light source imo..."the very best paint won't make a shitty prep job look good"...same with light in your grow...it will only benefit you 100% if all the other things are lined up just right...good luck in your choice and grow...but your primary focus should be on the other things involved that cause so many miserable failures and low yield disappointments...and as kushwick stated...the 7 240 is the better deal than the tri-band 120 money wise....I've used/have both....it's better...but not a difference like night and day...I think you'll be satisfied if you go with either/or....and will find that all the other things involved with "10" growing will require more skill and experience than your choice of light, given whats available from reputable sources today...I'll be looking for your grow....good luck...just my O...