Views: 21 Author: Site Editor Publish Time: 2018-06-01 Origin: Site
L and B can help you to know clearly.
L defines the percentage of lumen comparing with the initial lumens. B value means the failure data at the L data. So LB value indicate the real lifetime at a certain hours.
Like L80B10 at 50,000 hours means the LED lamp keeping 80% lumen from initial lumen and only 10% light failed to reach 80% lumen. You can get clearly L70B50 means only 50% lamp survive at 70% lumen remaining at 50,000 hours. So L70B50 light decay is faster than L80B10.
From the data, L100B0 is the best quality, but it's impossible to get that. So from good quality to bad, that is L90B10, L80B10, L70B50 like this.