1800LM LED Street Solar Light 5-6M Installation Height 20W Installation Distance 20-30m

solar tianjian light/LED//1800LM/3.2V/35 /5-6M installation height/20W/ installation distance 20-30m

I.Gerenal Introduction

1.Solar energy, low-carbon, clean and cheap, no electricity cost.

2.MPPT controller, intelligent battery management, prolong battery lifetime.

3.A-level solar panels, conversion rate> 15%.

4.High efficacy led lamps, up to 180 lm/w.

4.Auto dusk to dawn, 5-phase time control preset at factory, customized for each project.

II.Specifications

III. Q&A

1.what is PAS?

PAS is Publicly Available Standard, an informal rating-used in Europe. Whilst it is not a formal EN standard, it is an industry-agreed way of presenting data and procedures.

2. What does a life of 50000 hours mean in the case of LEDs?

50,000 hours would imply 5.7 years if the light is operated for 24 hours in a day, 7.6 years if the lights are on 18 hours per day and 11.4 years for 12 hours a day.

3.what are the factors that effect the lifespan of the LEDs?

The thermal management of the LEDs. If LEDs come on a standalone chip, appropriate heat sinks have to be designed to prevent premature failure of LEDs.

The electrical stress: Running LEDs at currents higher than specified make the LED run hot. This can happen with wrongly matched drivers. For example, if the driver produces 700mA but the LED needs 350mA, this will put stress on LED and reduce its lifespan.

Higher ambient temperatures than the ones that the LED is rated for will reduce its expected life.