Plants need blue (mh) light more than yellow (hps) light during sprouts, seedlings and growing season. it provides the necessary light for the healthy and strong growth of the plants during the growth period (18 hours of light / 6 hours of darkness). 18/6 - what is 12/12? lumens: 108500 life/hours: 24000 maximum 50 pieces of this product can be ordered. swordslife reserves the right to cancel orders over 50 pieces. there is less than 5 stocks to be sold at the campaign price. the seller determines the selling price of the product you have examined. this product is not included in the discount campaign. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.