looks too big for my little growbox
Ooo. I would avoid Amazon when shopping for a light
99% of the lights there are as bad or worse than what you have
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lol 
sorry my noob is showing, I have so much to learn but I’m enjoying the process, I hate I brought this grow box lol
dimensions I’m working with are 36" tall ×16" wide box
Let me tag the light specialist
@dbrn32 can tell you what you’ll need
Do you have a particular spending limit for a quality light?
That will help determine what lights are in your price range
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Amazon SOMEtimes beats other online venues on the HLG prices. so it’s not BAD to check there 
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Yeah if you’re looking for a known trusted brand
Hlg, spider farmer, etc
I just had a feeling the OP was going to compound their light problems with a 3000w blurple
With how much she paid for her 3 lights, could have got a good hlg
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Welcome to the group @sativamomma!! 
I definitely agree with others about the light. I also will question the temp of the water?
Your roots look like they got root rot, most likely the water being too warm.
Before you start your next seed, I would make sure you have a ph meter, tds meter, and a way to check the temp of your water. If your water gets too hot your roots will die due to root rot. Water temp 68-73 will be acceptable.
A better light or even if you can lower the lights you have, may work till you get a new light if you can.
Like mentioned above, give the dimensions of you grow box and a budget if you have one and db or someone here will be able to help you. Good luck! 
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16"x16"x36"? I’m guessing it’s a square then, please correct me if I’m wrong.
If that’s accurate I would probably look at hlg-65.
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100’s physically too big? i didn’t go check. that is a SMALL “grow box”. barely enough for one plant to stretch outward much
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What happens during stretch in a box that small. Maybe a new solo cup challenge but inside the smallest box possible.
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No, it should fit. But is probably more light than is needed if my guess is correct. I’m not completely sure though, I only seen 2 dimensions given for the box. Should be 3, LxWxH.
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More air stones if you plan to keep using that reservoir. It’s hard to tell if that’s translucent or actually totally opaque - it looks like light is able to get into the reservoir, but I am just guessing based on the photo. You will want it to be fully opaque, which can be as simple as wrapping the whole thing in tinfoil.
You’re gonna want a PH pen, a good TDS/EC meter - the best of both worlds is to get a BlueLab or Apera combo meter. It will also tell you reservoir temp, which I’m also suspecting was probably a bit high based on how sad your seedling looks. Roots should be bright, clean white with little offshoots, sometimes white fuzz - once it starts darkening and turning brown, you’ve got root rot. Not impossible to overcome but a serious pain. I have a bucket and 2 air stones I can’t use while it soaks in bleach water after a mild case of root rot myself.
similarly, invest in some Hydroguard - it will keep a supply of good bacteria in the reservoir in case your water temp goes over 68° or any light leaks in for a short time. It won’t stop root rot if light leaks are consistent.
Finally, just to echo everyone else here - more light. I have a 35w LED exclusively for my seeds when they pop. It sits on top of the humidity dome - literally on the top - and it’s barely enough light to keep them from stretching. I got a pair of VS1000s - Vivosun branded LEDs. Truth be told they’re wholly acceptable, nice bright lights for 100w lights. But for the price of two ($260) you can get an HLG 260w kit ($297 but there’s a 10% off code) and have more light output. You’ll find similar situations with most other lights on Amazon - they’re an okay jump off point but as you get a handle on how much light a couple plants need, not very many compare to the HLG lights.
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less than 200 for lights and thank you
thank you so much!!! I am learning so much from this community, you are so helpful and encouraging on this journey 
I will upload photo of the supplies coming today
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36×16×11" deep, small rectangle box lol im going to check out that light, thank you!
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The 11" may be tight. Someone recommended qb135 kit above, that is bigger light than you need, but it will fit better and is dimmable.
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if the 100 would be more light than needed wouldn’t the 135? or are you recommending because of physical dimensions between the 2 light fixtures? or the dimmable feature over the 100 model?
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The hlg-100 is almost twice the size (LxW) than a 288 board that comes in the 135 kit. And the hlg-100 isn’t dimmable. The qb 135 kit physical dimensions fit better and the dimmable driver included allow the fixture to be dimmed to more appropriate power level.
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I appreciate the help from all of you so much, thank you ×10, I will look into the light kit and more airstones, I will update shortly
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