Instruction: Evaluate the relevance of each product title in the input to the given query, and then sort the products in descending order of relevance, placing the most relevant product at the top of the ranked list.

Input:
Query: viper spectra 600 watt led grow light
Product list:
A: VIPARSPECTRA 450W LED Grow Light, with Daisy Chain,Veg and Bloom Switches, Full Spectrum Plant Growing Lights for Indoor Plants Veg and Flower
B: VIPARSPECTRA PAR600 600W 12-band LED Grow Light - 3-Switches Full Spectrum for Indoor Plants Veg and Flower
Answer: B,A