Flicker Index
Senior Member
- Location
- Pac NW
- Occupation
- Lights
This random bulb I got here is 8 years old.
Date code: 2017 Week 5. CHINA
7.5W 840 lm.
EcoSmart 1002459573
Rated at 15,000 hours
There are a few with higher lm/W than this, but there are plenty in the same range of output with lower lumens per watt out there in 2025...
The ballast on this LED lamp is different from a similar lamp you can buy now. If you were to put it in on a same switch, the dimming curve is so drastically different that you can not use them together. So, they're like tires on 4WD vehicles where you have to replace in sets or replace with the same exact type with similar wear level. This wasn't really an issue until dimmable L.E.D. type bulbs became a common place.
Date code: 2017 Week 5. CHINA
7.5W 840 lm.
EcoSmart 1002459573
Rated at 15,000 hours
There are a few with higher lm/W than this, but there are plenty in the same range of output with lower lumens per watt out there in 2025...
The ballast on this LED lamp is different from a similar lamp you can buy now. If you were to put it in on a same switch, the dimming curve is so drastically different that you can not use them together. So, they're like tires on 4WD vehicles where you have to replace in sets or replace with the same exact type with similar wear level. This wasn't really an issue until dimmable L.E.D. type bulbs became a common place.