Shootout: 5 inch miniquad propellers

Heads-up on the mistake: HQ 5x4 bullnose is actually an HQ 5x4.5 -- sorry :-)
Which five-inch propeller is most efficient? Which produces most thrust? Which is best for your miniquadcopter?
In this video I measure the static thrust, power and efficiency of several common 5-inch props:
- the Gemfan 5x3
- the Gemfan 5x4
- the HQ 5x3
- the HQ 5x4.5 Bullnose
- the carbon fiber 5x3
The results are very interesting and show that in order of efficiency we have:
1st: Gemfan 5x3
2nd: HQ 5x3
3rd: Carbon 5x3
4th: Gemfan 5x4
5th: HQ 5x4.5 bullnose
But in terms of thrust the winners are:
1st: HQ 5x4 bullnose
2nd: Gemfan 5x4
3rd: Gemfan 5x3
4th: Carbon 5x3
5th: HQ 5x3
Remember however, that thrust and efficiency don't tell the whole story...
The next round of the shootout will compare actual flight performance and handling.