“Can I still use hps light the in seedling stage? I’ve got a 600w I’m looking to buy. Would I have to turn down the wattage for that part of the grow stage?” – John
That’s a great question, because who wants to buy 2-3 different lights if they don’t absolutely have to? A 1000w would definitely be too strong for seedlings even if you dimmed it down; and while a 400w would be great for seedlings you may be stuck needing more power toward the flowering stage depending on the size of your grow.
That said, a 600w grow light- especially a dimmable one- can be used to grow seedling. Outside of the seedling stage, 600w’s are also known for growing plants clear through harvest, so 600w’s are actually a great investment for any grower. You just have to be careful not to overpower your seedlings, so you’ll either need to dim that light for a bit or have the ability to raise the light.
You probably already know 600w’s kick out lots of light and heat, so we suggest investing in a 600w light that has a dimmable ballast. At the beginning of the seeding stage, you may want to power the light down to around 50-75% of the overall strength. If that’s still too much power for your plants- or you can’t dim the ballast- raise the light to make sure your young plants aren’t frying.
Ventilation’s a must, too, but assuming you’ve already got plans for fans and filters, the key to using a 600w light with young plants is regulating light. Too strong and your plants will fry, not strong enough and your seedlings will have a hard time growing. We don’t suggest using a 1000w in the same way because no matter how much you dim or raise 1000w’s they’re still kicking out a significant amount of energy. 600w’s give you about 40% less power than a 1000w, giving you much more wiggle room for lighting than a stronger HID would.
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