Pancaran sinar ungu itu beradius 800 meter, sehingga untuk lahan sawah seluas satu hektar membutuhkan 12 buah WEL-T, tapi jika dibanding dengan pestisida masih lebih hemat Rp300 ribu, karena biaya pembuatan hanya Rp190 ribu, apalagi WEL-T lebih ramah lingkungan.
The purple ray has a radius of 800 meters, so it takes 12 WEL-Ts to cover an area of one hectare of paddy fields, but compared with using pesticides, it could save Rp300 thousand, as the costs of making it is only Rp190 thousand, not to mention that WEL-T is environmentally friendly.