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 if LED grow lights break down? Please contact our saels
representatives,the issue will be processed within 24 hours.
6. What is PPF? A: PPF is photosynthetic photon flux. PPF measures
the total amount of light that ranges from 400nm-700nm in per
second. The unit for PPF is micromoles per second (μmol/s).
7. What is PPFD? A: PPFD is photosynthetic photon flux density.
PPFD measures the amount of light that ranges from 400nm-700nm
arrives at the plant canopy per second. The unit for PPFD is
micromoles per square meter per second (μmol/m2/s).
8.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.
Contact us
Email:allengbeingsmartag@gmail.comWeb: www.gbeingsmartag.com
Address: Guoyue Science & Tech Park, No.1 LiRong Road, Dalang,
LongHua District, Shenzhen, China
