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some of the ones right under the red def have some stretched out tops, despite already being into mid flower set. looks a little like donkey dicks from heat stress

was running 12/12 with 30 min of far red at end of day to try to shave a week just discovered (weak) far red was on for almost all of night for better part of week whats this gonna do? potential herms/reversal? whats it gonna do to harvest time? this was week 4-5 (didnt use far red before week 4)

china issues are slowing everything down, last update was still 6-8 wks out

most meanwells require 90V to operate 'best yield' is a vague target, theres lots of ways to get there in general, 300-350W of LED at good efficiency will do a 3x3 right 4 cobs at 75Wea gets there

it really depends on how efficient you are removing heat from the tent/room/closet/space cobs and qbs will put out similar amounts of heat for similar efficiency designs

4 is good. hlg185 not much more cost than a 150 and may be useful in future

thanks for bump rocketsoul ! i also stock official HLG boards as well

i use them all the time for clone trays. thsoe and the 40W led strip shoplights. hard to beat for $15 as a replacement to the old T12 shoplights i had been using for decades

cool tech. everyone can benefit from locally grown microgreens, etc. way healthier than the crap you buy in stores https://www.engadget.com/2019/12/28/lg-indoor-vegetable-cultivator/

you can do a lot with the worst of meters. any metric is better than no metric when balancing your canopy! i always tell people dont worry about the number... find the best looking cola in your garden, measure the light there, and replicate that measurement throughout your space

interesting comparison on sensors (does not include latest offering SQ-620) https://www.licor.com/documents/oi26ib7eb6wm5y5u9ebv4b3jodm09tf9 of interest are the graphs on pg 5 and the tables on pg 6. apogee SQ-110 is not in the same class, and if i had to guess the hydrofarm would be right...

not with that sensor. it has near-zero response in the UVB range

unless your environment needs that heat

accuracy wise the the apogee 520 is not that far off the accuracy of the Li-cor li-190r going out to 1000nm is kind of overkill, you wont find anything past 800 with LEDs i still recommend the cheap $150 hydrofarm quantum meters to people looking to do basic light measurements in their garden...

never seen them. are they really 60W?

depends on type of light and spacing, etc

if you only have a budget of $159, buy an HPS

it will be difficult to determine the efficiency of no-name leds esp ones that use imaginary misleading wattage find out actual power draw of unit and shoot for 60-100% of the power you would use with HID

not as obsolete as the million SE HPSs out there still growing bud as i type this

ive got a handful of the 160W solarstorm 220s that are pretty good. the later series with the osram diodes (you can tell them by the pattern, more diodes, spaced closer together, in 2 rows of 4. older 'solarflare' series used crappy diodes they are pretty handy for easily lighting up a 3x3 veg...