i use reptisun 10 for my reps and the back uvb output is the same as recorded with that nec bulb at 12". to say that that bulb was a one off, is possible but a little unlikely. and in regards to gettting near what the sun produces i doubt their is a product around that even comes close. but it is enough within 30 cms. but who i would liek to hear from is somone who has only used nec 10 for lizards, especially baby beardies, within 30 cms. to see if they had any issues.