Latewood's 'little guide' to Lighting...No theory, just info!

[latewood]

a quick bump for the newbs

[mightymarijuanabuds]

good info here late .. nice thread :thumbsup:

let me just add that CFL's often have 2 ratings on them... the REAL wattage, and the wattage equivalency of a incandescent.... the 150w cfl you get in the store is not a 150w, but a 42w or 45w that puts out as much light as a 150w incandescent... the 125w CFL's (like envirolite) need to be bought at a garden store and require a mogul base, where normal CFL's will go into any normal light socket

also, you didn't cover why incandescent lights suck

basically, they produce more heat than light per watt, and that can be difficult to control temps in a closed space... plus they just waste electricity because of that... a CFL puts out way more light with way less electricity, and can be bought in cool (blue) or warm (red) white :twocents:

[HydroDynamics]

Wanted to bump this and add that you can use Highbay lights from Ebay (MH, not HPS as Highbays are rare in HPS), got me a 400W unit for under 50 bucks shipped. Quick trip down to the Hardware store for some sheet metal, chain, s-hooks, and eye-screws and will have myself a 400W MH with reflector for about 60 bucks, just great for the seedling/Veg cabinet/room!! Out with the four 4' flouros after they get a few inches tall and in with the MH!

Learning that you don't have to spend alot, just spend it wisely!!!

[mobay]

thanks for the info lakewood. one question my grow room is 4x6 , can i use a 1000 watt hps. thats 840 sq ft

[BOYZNUS]

[QUOTE=mightymarijuanabuds]good info here late .. nice thread :thumbsup:

let me just add that CFL's often have 2 ratings on them... the REAL wattage, and the wattage equivalency of a incandescent.... the 150w cfl you get in the store is not a 150w, but a 42w or 45w that puts out as much light as a 150w incandescent...

WHY IS REAL AND EQUIVALENT RATING DIFFERANT?? I THOUGHT THE RATINGS WERE,, 100 WATTS OF LIGHT FOR ONLY 45 WATTS OF POWER. LUMENS WERE THE SAME. AM I WRONG?

SORRY LATE FOR INTERUPTING UR THREAD BUD. THNX

[mightymarijuanabuds]

yea thats right.. the lumens (not a very good measure of light.. but anyway) output from the 45w CFL is equal to that of the 150w incandescent... but the incandescent puts out WAY more heat and of course uses about 3x as much power

so to say we have a 150w CFL (do they make those?? i have only seen the 125w envirolights...) means it would have to be equal to 450w of incandescent light.. id like to see one of those LOL

of course we can't alway apply that .. .because i have replaced all the 60w incandscent bulbs in my house with the equally rated cfl, which ended up being 13w.. so now all the bulbs in my house use up about as much as one did before :P

you are right, the amount of light output is the same, just the amount of heat put out and power used are different, but it is important to make light of the difference between real and equivalent ratings so the newb folk don't get too confused the first time they are out buyin lights

[BOYZNUS]

[QUOTE=mightymarijuanabuds]
so to say we have a 150w CFL (do they make those?? i have only seen the 125w envirolights...) means it would have to be equal to 450w of incandescent light.. id like to see one of those LOL


THE CFL'S HERE ARE 45/100. SO QUESTION IS,,, DO I HAVE 900W IN MY VEG ROOM, OR 405W? I HAVE 9 x 45/100 CFL'S.

[mightymarijuanabuds]

you have 405w of CFL :thumbsup:

IF you were using incandescents, you would need 900w to equal the amount of light that you have now, which would easily drive tempertures way out of control and fry your plants... even if it were feasible, you would be more than doubling the cost in electricity

heat / electricity / lower light output are the 3 main reasons why incandescent lights suck, and shouldn't ever be used in a grow.

CFL lights can be had in the same and even better spectrums, there is no good reason to use incandescents over CFL.

[BOYZNUS]

AMEN MMB

[latewood]

I meant 150w cfl's, it might be 125w...bigger than you guys are talking about...and no-ones interrupting this thread...that what it is here for.

You are right, 45 watt cfl's = to 150 watt output, lumens wise...
at hompot...they have some 125 w cfl's now...big ass lights...as well as more powerful elongated cfl's...keep in mind, they are not all corkscrew shaped.