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Indoor Garden Led Grow Lights Top Led Grow Lights For Light Led Grow Light Quantum Board
1. What are your terms of payment?
We can accept Paypal for sample and T/T for bulk order.30% T/T in
advance, 70% balance before shipment.
2.What about the lead time?
Sample needs 3-5 days, mass production time needs 2-3 weeks.
3.How do you ship the goods and how long does it take to arrive?
We usually ship by DHL, UPS, FedEx or TNT. It usually takes 3-5
days to arrive. Airline and sea shipping also optional.
4.Do you offer guarantee for the products?
Yes, we offer 3 years warranty.
5. What is PPF/W and why PPF/W becomes µmol/J?
PPF/W is the measurement of photon efficacy.
Photon efficacy measures how much energy is used by the fixture to
make the light that ranges from 400nm-700nm. It tells how efficient
a grow light at converting electrical energy into photons that
useful for plants.
The unit for PPF is μmol/s, and the unit to measure watts is Joule
per second (J/s), therefore, the seconds in the numerator and
denominator cancel out, and the unit becomes µmol/J.