So I bought a new
Spider Farmer SE5000 (upgraded) about a month ago.
The instruction manual says the following-
SE Series Hanging Recommendations for Veg state with room temp below 82F - hang at 8" and the recommended dimming for Veg state is 60% - 90% power.
That sounded a little close to me early in veg at that power so I hung it at 16" at 40% power. My very healthy Blueberry Muffins hated it and started drooping and turning pale within a couple of days.
Long story short - Light now hangs almost 48" above the plants at week 6 of veg with dimming set to 60%.
I've read multiple accounts in the forums here where people were experiencing the same issue if you follow the manufacturer's recommendations.
Don't get me wrong, I love the SE5000... they just need to re-write those instructions, otherwise your plants will be light-stressed right off the bat.