HappyHobbyist

Hi Jose,

I had not seen this type of info comparing to the Sun. Thanks.

I do wonder......How would that new 65watt compact floro rate?

I would pay pal you the $30.00 to get one but,.. well,................ ya know.....

a+ on the altruism, thanks agian.

peace

Oh, has anyone used the 65 watt with that....houw u say sombrero hood? I own two of these American Lights goodies, and I must say the reflector suck s for MJ. I have drilled holes to keep em cool, delt with photo sensors bla bla,

A little off post but a proper reflector for these lamps could be a hot E-Bay item?

Xzoomd

i use the fluorex..3 of them. here is alittle data. they come in two models, which is confusing, because one (flood) and a worklight, which i can't find. the flood they rate at 6825 lumens, the worklite over 8000. i did alittle research and found they both use the same replacement bulb. hmmmm so maybe you are right...flood reflector is cutting down lumens !?
anyway, they are 6500 on the kelvin scale. and i believe, not sure, that are 127 csi. pretty sure it is higher than hps until you get to the 1000w mean lumens. or lpw...if it's real important, i'll look it up. not real familiar with csi and lpw, that kind of stuff. that's where jose' comes in.

oh, and i drilled the devil out of my first one. hole every where. but i found that just removing the plastic cover cools it down with alittle brisk breeze from a fan on it. and yes..the sensor! a lot of people are having trouble with new fluorex' and i think that may be the culprit. not much inte instructions..especially for stoners the sensor needs to be tape or painted so no light gets in. now i notice they come with plugs . i have been using these things since the end of january 2001..no problem. another thing..if the bulb should happen to pop loose from the socket..don't try to just snap it back in..unplug it and screw it ouy before snapping it back together. i have broke two bulbs trying to snap it back while still screwed it. $.02
since this is jose's thread...

think globally..grow locally..and grow on!!

zoomy

schoolteacher

Wow look at that! Great work Mr Hemp Seed!
I have been churning about this for a while. I am curious about how you obtained your values. Did you use a light meter or a camera? Your values are just a little off from my unorganized estimations. I have been playing with my light meter and measuring output of my lights and comparing it to the sun. In order to get EV 14 (F16/ASA100/60th of a second facing the north sky on a sunny day) I had to put my light meter only two inches away from my 175 watt metal halide. I was very discouraged and it caused me to get a new bulb for my 1000 watt setup. After using my light meter to measure the output of the 1000watt agrosun, I was able to obtain EV 14 at 32" from the bulb and about EV13.5 all the way out to about 40" from bulb. This is proof enough for me that the diffrence between the 1000 watt lights and all others are staggering.
On a side note, my understanding was that EV 14 was the light produced by the noon day sun. I look at your chart and it seems you have the noon day sun a little higher. Is this due to your tropical location? I tested the meter on a textbook noon day sun and got only EV 14. Mabe a little more if I pointed the meter sensor right at the sun! Your lumens info is a very nice touch. I think I will go back and study your excellent work!

ommamedmar

Hey Jose; cool post.

According to your chart, I'm getting between 1,000 to 1,600 watts per square ft. of plant in the greenhouse...HOLY Crap!

__________________
"In the province of connected minds, what the network believes to be true, either is true or becomes true within certain limits to be found experientially and experimentally. These limits are further beliefs to be transcended. In the network's mind there are no limits."
~~ Dr. John Lilly

"...Like some tacky little pamphlet in your daddy's bottom drawer."
~~Frank Zappa

Jaguar

yea guys you've been talking about the flourex bulbs who are doing some nice things for us(savin lots of freakin money) I have two of those lights of america flood lights from home depot the 65w ones and one 95w compact flouro from fearlessgardener.com how do those two rate in the chart??? has anyone else used the 95w bulbs? i just got mine two days ago and dont know yet if they really work that good i'll keep u guys posted on that.

Xzoomd

the envirolite? how much? did you pay like $100?

zoomy

JoseHempSeed

thanks for your comments, everybody, i'm glad you're finding the post interesting!

i don't think your location should have too much effect on the sun measurement, as long as you're in a reasonable location (not in Nome in the middle of the winter ), the noonday sun should be about 10k lumen/ft. sq just about everywhere...which is about EV 15...

one thing i have noticed, some meters have a wider angle of view (for example a 28 mm lens vs a 200 mm lens on your slr) and will tend to include more of the "scene" in the measurement than you really want, like trees, the side of the house, etc.
to get an accurate measurement, you want to measure only the sun's rays, you don't want the meter to come up with an ev for the "scene" (like it's supposed to!!!)

that kW agrosun sounds fantastic! that' another thing, the reflectors sure make a difference. when you can read light that bright at different distances means there's not much dispersion, your reflector is really helping. what brand/type of reflector is that?

also, i'd like to use your data in the next chart - the kW lamp will make it more complete, OK???

zoomy, jag, any chance of measuring the florex???

Think Globally. Act, and Grow Locally!

schoolteacher

I'm getting my tape measure out right now to take some meterings! Are you using a camera or an ambient light meter to get your numbers? If you are using a camera you would want to use a 70% gray card to get good numbers. I am using an ambient light meter witch does not look at the sceen but the actual lumens. About EV, I have been trying to get a difinitive value to compare to the sunny 16 rule witch we know is about 10,000 lumens. take a look at this link on photo.net it shows exactly why I hate to speak in EV. My girlfriend has a degree in photography and she says that no photographers can agree on EV values under different conditions. Take a look and I will post my numbers later! http://www.photo.net/bboard/q-and-a-...?msg_id=000CCc

Xzoomd

no..no camera..no meter...yet! i want to get a tds meter first.

zoomion, student of ions

JoseHempSeed

yep, yep, yep!

that's one of the things about light measurement, there are so many ways to do it, it gets really confusing after a while. even though everyone is measuring the exact same thing! especially when you get photogs into it...

but yes, i use a sekonic digi-lite l-328 meter. it's a higher-end meter that is pretty accurate for ambient light measurement. it has seperate heads for measuring illuminance (they call it a 'lumidisc') and incident light (the 'lumisphere'), guaranteed to be +/- 0.1 EV accurate. it takes a lot of the guesswork out of the conversions, and is simple to operate.

be careful with the grey card measurements - - what you're getting there is the correct exposure, based on 18% reflectance, not the actual light measurement!

i'm still jealous over the kW agrosun...you're going to get some great buds... you'll have to post some pics of the set up...