T5 or LED, which is best?

I have two lights and only one place to use them at the moment. I'm not sure. what to use. 
 
The T5 is 4ft long with 8x 54w tubes. I don't know the age of the tubes but they look ok. It's rated at 432 watts so at a guess I'd say it probably actually uses about 400. All the tubes are 6400k.
 


The LED is a 144x 3w reflector. It's rated at 432 (major coincidence haha) but I believe it uses about 270 watts.
 

 
I already have both so the value doesn't come in to it. The amount of electricity costs to run isn't an issue. The T5 will be used for an auto seed making project in a month or so, but for now I have a tent of 4'x3' that has some tangerine dream clones and I'm planning to veg for a few weeks and then flower using either one of these lights. 
 
Which would give the most growth do you think?

 

I just bought the T5 for 50 bucks, I couldn't walk away without it at that price

 

I also have a 250w HPS / MH, that uses 270 watts too. I feel it and the LED are about equal but as with all HPS you do get a bit of stretching. I have noticed tighter nodes with the LED. I have never used the T5 so have no idea how much heat it's going to put out. I guess it's going to be a lot more than the HPS and LED as it uses a lot more power

 

Having them both is going to use too much electricity and create too much heat for my ventilation system to handle

 

 
I don't mean the surface of the  bulb getting hot but the unit as a whole heating the tent,  this includes all 8 ballasts and the bulbs themselves, even though the surface doesn't get to a very high temperature. There is a hell of a lot of surface there to contribute. 
 
I could be wrong but I would have thought that a 432w florescent unit would produce more heat than a 250w HPS

 

 
I'm not buying anything else. The plants were initially going to just have that LED. But now as chance would have it I picked up the T5 cheap so I might use that instead

 

 
Despite popular belief the whole Kelvin temperature flower/veg thing really isn't that important when it comes to fluorescent. But either way I am not buying anything. I was originally just going to use the LED. If the T5 was better I would use that instead as it's just going to be sitting there doing nothing. I don't need to worry about getting great yields, I have a 600w HPS for that. I was only asking for opinions on the two lights because I have both available right now 

 

 
I like the sound of that. My T5 light will eventually be used in a 4x4 for a breeding project. Ill be using a lot of very small plants so need to keep stretching to a minimum. That's why I wanted the T5. Originally I was going to use the  HPS but I fear the plants will stretch like crazy, the middle plants will get a lot more light that the border, and the heat it gives off will cause me to use a bigger exhaust fan and my grow op is noisy enough as it is. They will be flowered with this light too but I'm not looking at big yields as it's only seeds. If I get 100 seeds per plant I would be more than happy