Other companies are making similar LEDs now.
They are bright, but not efficient. A 'regular' bulb can do better.
LEDs last longer if that's important.
The 5mm LEDs are more efficient, cheaper per lumen, and will last longer than the high power LEDs.
I'd suggest a 40 degree 5mm.
Don't push them too hard, maybe 15ma. Heat kills.
If efficiency is the goal, use twice as many LEDs at half the amps each. It will be brighter with the same power.
Measure the amps. Generic internet LED math is usually wrong by a long way, overpowering the LEDs, meaning a much shorter life, and not as efficient.
Start at 3.2Vf calculated circuit design for modern white 5mm LEDs.
If it's too good (cheap) to be true... It's junk.
G-