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Reliability Basics Derating for Electronic Components Derating is a technique usually employed in electrical power and electronic devices, wherein the devices are operated at less than their rated maximum power dissipation, taking into account the case/body temperature, the ambient temperature...

Fair enough. I'd rather not come home to find the garden's been dark for 10 hours, only to have to fix it after the fact. Talk to any electrician.. 20% headroom is important. It's not fantasy. If we have the cash to pay $50 a bulb, then a few extra dollars per driver isn't that hard to come up...

Yes.. yes I do. It means the Mean Wells are 94% efficient at converting 110 ac to 1400mA dc. But they're the same efficiency at 80%. If they calculate the lifespan of the product at 80% load, then you can be assured they calculated the 94% efficiency at the same load. Look at the specs of...

The yields would be the same. Amount of energy used for the same light fixture doesn't equate to higher yields. Do what you want, BOBBY_G.. I like to prevent problems before they happen. Cheers.

In the old days, maybe.. but not so much with switching regulators. Just think of your pc's psu... it may be 650w, but you wouldn't want to max out your components to the exact 650w. And running it at 50% load isn't any less efficient, really. The reef builder community uses them, and they use...

I didn't mean that as an insult. I just meant spending the $15 more per driver for piece of mind is better. It doesn't matter if it's top of the line.. running at 100% load will reduce it's life expectancy, and could cause it do die 1/2 way through a crop. These things do die.. growmau5's...

What good's the warranty when you have to wait for a new driver... 1/2 way through a run? Do you have a backup light for the week or 3 it's going to take? Unless you have a decent electronics shop in town, that carries the same or equivalent driver.. you're going to have to wait more than a day...

62,000, but that's at 80% load. Durability reduces at 100%. Ask any electrician.. they'll tell you it's better to have 20% headroom. Personally, I don't care what you do.. I'm saying I'd prefer to have the 20% headroom. Watching the diy tech talk on greenegene's youtube channel, growmau5 said...

Personally, I'd go with the 240h.. running a driver or power supply at 100% load isn't the best thing for the device. Rule of thumb.. don't go over 80% load.. give yourself 20% headroom. Look at the spec sheets for the drivers.. they're life expectancy is rated at 80% load. So.. 4 COBs at 36v =...

You're obviously the better man then... lol.

I guess I learned something.. I actually thought it would increase. I just compared a few Noctuas, and sure enough.. they dropped. :P But either way... they still do the job for what he needs. A cab may not be your thing, but a DR90, a 3x3x6 tent, is all a lot of people really need. That's...

That's just it... it doesn't matter how much heat he's exhausting... it's the "scrubbing" of the odours. And as for the CFM getting "thrown out the window".. this is true, but that's with all fans. It's not so much the CFM, but rather the static pressure.. the actual force of the air. In a cab...

Mine were 6" axials.. can't remember the cfm or wattage.. I had them on dimmer switches anyways. I'm going with dc fans this time, so I can control the fan with a PWM signal from an Arduino I'm going to be using with my panel. That.. and the DC fans are cheaper than the AC fans.

It all comes down to your grow area's cubic foot space... you say you're using LEDs, but not what you're using for space.. ie: a tent, a closet, or a cabinet, etc... For instance.. I'm figuring a way to filter a DR60 v2.. 2x2x5'.. 20 cubic feet. I was considering a Can-Filter, with a 4" Stealth...

thanks man... life took some turns, but I'm still bouncing around :)

Reviving an old thread here.. lol. The X5 spectrum is nothing special really.. growers have been doing it for years with HIDs... usually at a 2:1 or 3:1 hps to mh ratio. Even with fluorescents, at a 1:1 ratio of Warm Whites and Cool Whites. Instead of going through some company to build your...

Olivia's and a couple drops of SuperThrive :D

Exactly.. too many factors involved to use gpw as an accurate measurement. The Size of the room/cab, how many plants in the space, and if they all get grown the same from babies to harvest, or is it a perpetual system, where only 1/3 of the total plants get harvested at a time. I used to do a...

Turns out it's the cheap materials used in ChinaCraps.. LedEngin uses a "glass" dome, so that why "they" don't discolour... Evil66 is in the coral reef community, with his own shop.. he knows his LEDs ;)

If you look at that ledgtow.eu page, he just did a root test.. FarRed promoted more roots.