If its because the chip i mention is a smd can i say don't be frightened to try just make sure your not using a blow lamp to solder with, I have soldered these i.c.'s using a soldering iron, there are a few ways of removing the solder if you mess up, solder sucker for one, then check by running a stanley blade between the contact legs to make sure no "whiskers of solder is left".
Can i say if you can buy leds at a good price like Meeee. if your using the LED panel light which will have a resistor in using red leds as a zener could be good. Red LEDs have a 2.2 volt drop times this by 10 in series, yes you've got it 22 volts so 20 leds will give you 44 volt drop with your 24 volt panel light also in series your resistor in the panel light current limiting you leds you will have a 68 volt led ...and a lot of additional light ..but no heat
this is food for thought.