How to choose smd led by parameters?

Question

Do it yourself

I read on giktimes that good LED modules are made by Seoul semiconductor, CREE Inc., Luxeon Philips, Edison, Nichia
I need to collect two 2x5 mm panels with a luminous flux, one up to 1000 lumens, the second 1700-2000
With a total consumption of up to 30 watts, color temperature 4000 -5000 K
From which diodes is it better to make such panels?

Answer 1

Cree, the leader in lm/w efficiency in the best diodes, gives 170 lm/w. In your case, I would count on a maximum of 100 Lm / w
One crystal, for example XP-G2 has dimensions of 3.5x3.5 mm. The maximum that you remove from it is 5 watts. and then, due to the non-linearity of the return, somewhere around 80 Lm / w.
More powerful options are crystal assemblies, where recoil and power increase in proportion to size.
You can get 2000 lm with a power of 20 watts. , but the dimensions will clearly exceed your wishes.
The only option is the Luminus SST-90 series; But I would not recommend doing crafts on it. The issue of optimal thermal transfer is not easy to solve with it.