Led lights for live events
Because the world is full of charlatan vendors that like to confuse the buyer into thinking they are getting more than they are paying for.

The problem is 270 watts requires thermal management that includes expensive heatsinks and fans. 

So they deceptively specify the wattage of the LED components but only drive it hard enough to where they begin to get hot. 

The most important specifications I must know before buying an LED or LED light fixture, is the lumen output (or flux) and the total power used.  I can then calculate the efficacy in lumens per watt. If it is an RGB, I want to know this spec for each color at 100% and the other colors turned off.  

I do not care about the max rating of the LEDs.  I will not buy from anyone that uses that technique as I do not like charlatan vendors.  Also I would never buy an LED product that does not specify the flux output (lumens, radiant watts, or photons per second)

Charlatan vendors will often specify the wall watts and no flux.  With no flux output specified you cannot compare the amount of light per watt.  They could be using very inefficient (read cheap) LEDs and LED drivers.

For stage lighting I would use LEDs that are made with color mixing capabilities.  Lumiled's   Color C line and  Color CZ  are very  good candidates. I also like deep red (660 nm) over "red" (625 nm).  625nm is really a red-orange where 660nm is a nice deep red.  The only problem is that deep red has fewer lumens per watt so you would need more LEDs than red to get the same lumen output.  Only Cree, OSRAM, and Lumiled make deep red.  I prefer the OSRAM Oslon SSL 150.

There is an easy and inexpensive way to make your own stage lights that would be better and or less expensive.  All you need is to generate the Gerber files for the circuit board.  For example these guys have very inexpensive PCB fab and assembly: pcbway.  And their quality is very good.  Currently (June 2018) for $5 you can get ten 100mm x 100mm (4" x 4") boards and have them populated with up to 89 LEDs (e.g RG&amp;B) for $88. Plus the cost of the LEDs.