Northern Lights ® Cannabis Seeds from Sensi Seeds. Northern Lights is an absolute must for the indoor marijuana grower! For many years Northern Lights marijuana dominated the various Marijuana Harvest Festivals. Through selective breeding we have succeeded in producing one of the most powerful marijuana plants in the world. On top of that, we have developed a pure cannabis indica strain highly adapted for indoor marijuana growing: compact, powerful with a good yield and exceptional resin production. A most lucrative plant for the indoor grower. Flowering: 45-50 days. Height: 100-125 cm. Yield: up to 125 gr. Qty: 10 Marijuana Seeds