After assembly I decided to do a practical test of LED modules. Plan was to test the curing of TP-2500 adhesive and PCB solder mask. TP-2500 is OCA type adhesive and is used to bond surfaces where maximum light transmissions are needed. It is very popular in the phone repair business. It is used to glue the front protective glass to the LCD. PCB solder mask is also a generic one that you would use during PCB repair or manufacturing process. Since these products are very popular they are good benchmarks.

Video shows me using a 365nm(LTPL-C034UVD365) LED module. Testing with a 400nm(PQ2N-3FLE-AFC) module gave similar results. Both modules were running at lower power values than designed(about -30%) due to heat dissipation problems caused by having FR4 PCB. Final version should have aluminium substrate PCBs which will increase output power and curing performance.

*For testing purposes "Mechanic" brand of UV adhesive and solder mask was used.