OK, I am sure some of you have done this, But here is what I got.
1st, i'm a retired still photographer, and I have a lot of lighting (photographic) Experience. To get my readings I used a sekonic L-718 digimaster light meter that gave me a EV (exposure value) reading. This was a $250 meter when it was new, and in general very accurate. It is not a cheap $40 dollar garden center or camera shop meter. I then used the International Light Converter website. For general purposes, LUX and lumens are about the same thing except in their application. I am using a brand new Lumatek 600w (dimmable) ballast switched to 110% and a week old Hortilux 600w SuperHPS bulb in a Yield Master II 6" air-cooled reflector.
I first measured about 6" below the glass and got a reading of 15.4 or about 109k lumens. I then measured at my tops and got an average EV of 14.7-15.1 or 62.5k lumens to 89k lumens.
First I found it VERY interesting that I read 109k lumens off the bulb
. The bulb is rated at 90k lumens so i checked the calibration on my meter and it was dead on. I wonder how they get the 90K lumens number
? It has to be a number average from a different distance or different period in the bulbs life.
I am now excited to try it under different hoods, with different ballasts and with different wattages. If anyone else has has a similar experience PLEASE give your feedback.
Thanks!![Razz :-P :-P](/styles/smilies/icon_razz.gif)
1st, i'm a retired still photographer, and I have a lot of lighting (photographic) Experience. To get my readings I used a sekonic L-718 digimaster light meter that gave me a EV (exposure value) reading. This was a $250 meter when it was new, and in general very accurate. It is not a cheap $40 dollar garden center or camera shop meter. I then used the International Light Converter website. For general purposes, LUX and lumens are about the same thing except in their application. I am using a brand new Lumatek 600w (dimmable) ballast switched to 110% and a week old Hortilux 600w SuperHPS bulb in a Yield Master II 6" air-cooled reflector.
I first measured about 6" below the glass and got a reading of 15.4 or about 109k lumens. I then measured at my tops and got an average EV of 14.7-15.1 or 62.5k lumens to 89k lumens.
First I found it VERY interesting that I read 109k lumens off the bulb
![Laughing :lol: :lol:](/styles/smilies/icon_lol.gif)
![Hit Wall :wall: :wall:](/styles/smilies/wall.gif)
I am now excited to try it under different hoods, with different ballasts and with different wattages. If anyone else has has a similar experience PLEASE give your feedback.
Thanks!
![Razz :-P :-P](/styles/smilies/icon_razz.gif)