Product characteristics ：
Ideal for residential and commercial environments, SIYING ECO bulb replace incandescent and fluorescent lamps without losing their characteristic effect, much more economy and durability.
| SY-S016 | SY-S016F | SY-S017F | SY-S018F | SY-S019F | SY-S020F | SY-S021F | SY-S023F |
| wattage | 3W | 4W | 5W | 6W | 7W | 8W | 9W |
| Base | E27/B22/E14 | E27/B22/E14 | E27/B22/E14 | E27/B22/E14 | E27/B22/E14 | E27/B22/E14 | E27/B22/E14 |
| Model | C37 | C37 | C37 | C37 | C37 | C37 | C37 |
| Lumen flux | 240lm | 320lm | 400lm | 470lm | 560lm | 640lm | 806lm |
| Eff | 80lm/W | 80lm/W | 80lm/W | 80lm/W | 80lm/W | 80lm/W | 80lm/W |
| Ra | >80 | >80 | >80 | >80 | >80 | >80 | >80 |
| Voltage | 100-240V/AC | 100-240V/AC | 100-240V/AC | 100-240V/AC | 100-240V/AC | 100-240V/AC | 100-240V/AC |
| Life span | 15000 hours | 15000 hours | 15000 hours | 15000 hours | 15000 hours | 15000 hours | 15000 hours |
| frequency | 50/60Hz | 50/60Hz | 50/60Hz | 50/60Hz | 50/60Hz | 50/60Hz | 50/60Hz |
| Beam Angle | 160° | 160° | 160° | 160° | 160° | 160° | 160° |
| On/Off times | ≥15000 | ≥15000 | ≥15000 | ≥15000 | ≥15000 | ≥15000 | ≥15000 |
| Product size | 37x131mm | 37x131mm | 37x131mm | 37x131mm | 37x131mm | 37x131mm | 37x131mm |