Which kind of LED shoud I use for
The CoB LED you tried is only 117 lm/W.  

If you search Digikey Optoelectronics > LED Lighting - White and sort by Lumens/Watt you will find an LED that does 229 lm/W. Everlight 62-227ET/KK7D-3M5050X6Y62629U6/2T/EU  

A 9V battery is insufficient for a bright (60W equivalent i.e. 800 lumens) LED lamp. A 9V alkaline has about 550 mAH which would last less than 1 hour driving 229 lm/W LEDs with at the brightness of a 60 Watt light bulb.

If you want a warmer LED the 3500K 80 CRI LED is 213 lm/W.

The 229 lm LED has an output flux of 40 lumens @ 65mA and a forward voltage of 2.75v.  You do not want to run these at a higher current as the extra heat will decrease the brightness 10-20%. 

For 800 lumens each lamp will need 20 LEDs and 1.2 Amp @ 2.75v, 600 mA @ 5.5v or  400 mA @ 8.25V.

You mentioned you were looking for SMD LEDs.  Later you say soldering is difficult. What you may rather use is an 8.8V Samsung Strip at $12.  At 550 mA it will give you 800 lumens.  

Or a better option might be a $4 Bridgelux EB Series Gen 2 Strip powered by a $7 Mean Well LDB-300L Constant current Boost LED driver with a 9V input and 300 mA output which would give you ≈1000 lumens at the 300mA output of the LDB-300L driver.  

Then an issue with battery powered LEDs is the brightness decreases as the voltage drops.  It is recommended at constant current regulator be used which is the equivalent of a variable resistor that auto-adjusts the current to whatever voltage.  I would recommend the ON-Semi NSI45060JDT4G .

For batteries I'd go with a 9.6V NiMH rechargeable battery pack (8 AA) which is good for about 600 recharges when discharged to 50% per charge.