The goal for these weren't necessarily to fill an entire 10x10 grow room while I have come close. They are designed to give people the slow option of easing into better technology primarily.
The other benefits are smaller spaces or adding additional lighting to an existing space. One of my favorite uses is adding these into hps rooms with a higher 6500k version cob which is known to increase resin and terpines in flowering plants.
Cobs and technology for that matter is never inexpensive. While most multi cob lights sold today are out of financial reach for people in the efficiency market these allow people to do it as slow or as fast as they want to.
138 witchy [emoji106]