# Lighting Information (PAR, PPFD, umol/s, DIL) **URL:** \ **Category:** Lighting\ **Tags:** lighting, flowering, autoflower, indoor-grow\ **Created:** [March 19, 2021, 11:48pm UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448 "2021-03-19T23:48:18Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![GeMann](https://avatars.discourse-cdn.com/v4/letter/g/ee59a6/32.png) [@GeMann](https://ilgmforum.com/u/GeMann)\ **Post date:** [March 19, 2021, 11:48pm UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/1 "2021-03-19T23:48:18Z")
I would like to hear others opinion on this subject matter: I have a 5x5x8 tent Lights:HLG 600 Rspec and 2 HLG 100 3000K AC Infinity T6 fan for exhaust 400 CFM fan w/controller as my intake 1 oscillating 16" fan 8" fan for bottom air flow my question is I need to know the different reading (PAR, PPFD, umol/s, DIL) for each stage I ask this is because I got this new light when they was 1st in flower and I underestimated it and I think I did something to them at that time. this is them 83 days from seed information is much needed…PAR, PPFD, umol/s, DIL ![1](https://global.discourse-cdn.com/growingmarijuana/original/4X/b/3/1/b3169ac3d8849d3fd8b5ab36f3b06068f53becaf.jpeg) ![IMG_2116](https://global.discourse-cdn.com/growingmarijuana/original/4X/d/a/c/dac5e8a1265162fe747c0579d50a900315289ede.jpeg) ![IMG_2117](https://global.discourse-cdn.com/growingmarijuana/original/4X/4/a/1/4a148f3d157bb61306942569f505a9e51af3b636.jpeg) ![IMG_2118](https://global.discourse-cdn.com/growingmarijuana/original/4X/d/0/2/d02a63289e26b778d7c12617ba6f29225bbe56ae.jpeg) ![IMG_2119](https://global.discourse-cdn.com/growingmarijuana/original/4X/d/1/8/d18b3ba1e1c5624c41013839d864d499ef5068f8.jpeg) ![IMG_2120](https://global.discourse-cdn.com/growingmarijuana/original/4X/8/5/d/85dc8734be8776b408c8a0d0e901c44e8e54a298.jpeg) ![IMG_2121](https://global.discourse-cdn.com/growingmarijuana/original/4X/0/4/0/04060f079cb776536e920f6e37e6b6ca825d0548.jpeg) ![IMG_2122](https://global.discourse-cdn.com/growingmarijuana/original/4X/0/6/2/062511199854e65587d2257f2f65fa2974168225.jpeg) ![IMG_2123](https://global.discourse-cdn.com/growingmarijuana/original/4X/8/a/a/8aa5b75e9185cd94c25bca4ce9d58eef55a1e570.jpeg) ![IMG_2124](https://global.discourse-cdn.com/growingmarijuana/original/4X/0/2/d/02d34919d897f7783f3eaa832b6e2e0bb26748ec.jpeg) ![IMG_2125](https://global.discourse-cdn.com/growingmarijuana/original/4X/0/9/4/0949612f60ea1d93fd9df3bd196e872de839ba4e.jpeg) ![IMG_2126](https://global.discourse-cdn.com/growingmarijuana/original/4X/0/7/f/07fca3fc17054426f75204ce93f5331d1c99f300.jpeg) ---
**Author:** ![BobbyDigital](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bobbydigital/32/1220557_2.png) [@BobbyDigital](https://ilgmforum.com/u/BobbyDigital)\ **Post date:** [March 20, 2021, 12:35am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/2 "2021-03-20T00:35:25Z")
Here is the DLI map. To calculate your DLI: PPFD x (3600 x your light hours) / 1,000,000 = DLI. ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/d/b/4/db4ee68824f74161c20e79faee4175681f8a06e0.jpeg) ---
**Author:** ![GeMann](https://avatars.discourse-cdn.com/v4/letter/g/ee59a6/32.png) [@GeMann](https://ilgmforum.com/u/GeMann)\ **Post date:** [March 20, 2021, 12:41am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/3 "2021-03-20T00:41:31Z")
I did 20/4 on this grow, going back to 18/6 on the next grow thank you ---
**Author:** ![BobbyDigital](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bobbydigital/32/1220557_2.png) [@BobbyDigital](https://ilgmforum.com/u/BobbyDigital)\ **Post date:** [March 20, 2021, 12:51am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/4 "2021-03-20T00:51:55Z")
They look really good! With those lights you definitely don’t need 20/4 hours. Just a bunch of wasted light that the plants can’t process. ---
**Author:** ![GeMann](https://avatars.discourse-cdn.com/v4/letter/g/ee59a6/32.png) [@GeMann](https://ilgmforum.com/u/GeMann)\ **Post date:** [March 20, 2021, 1:04am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/5 "2021-03-20T01:04:43Z")
yeah… this is what I was thinking I looked over at the and theres a site that you just adds all the numbers up,I suck in math I have dyscalculia had it as a child and did not know i had it…back to the numbers I was in the high end of 800 ---
**Author:** ![BobbyDigital](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bobbydigital/32/1220557_2.png) [@BobbyDigital](https://ilgmforum.com/u/BobbyDigital)\ **Post date:** [March 20, 2021, 1:28am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/6 "2021-03-20T01:28:19Z")
800 is where you want to be in flower for 12 hrs. 700 for 18 hrs in veg. ---
**Author:** ![GeMann](https://avatars.discourse-cdn.com/v4/letter/g/ee59a6/32.png) [@GeMann](https://ilgmforum.com/u/GeMann)\ **Post date:** [March 20, 2021, 1:34am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/7 "2021-03-20T01:34:34Z")
20 hrs is 600 were I should be at??? ---
**Author:** ![BobbyDigital](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bobbydigital/32/1220557_2.png) [@BobbyDigital](https://ilgmforum.com/u/BobbyDigital)\ **Post date:** [March 20, 2021, 1:38am UTC](https://ilgmforum.com/t/lighting-information-par-ppfd-umol-s-dil/64448/8 "2021-03-20T01:38:14Z")
For veg that’s fine. Too much for flower. That’s a DLI of 43