Specifications: 1) Model: BN-236248 a) Neon tubes: 3\'\' x 2pcs, 4\'\' x 2pcs b) With built-in transformer on one end of the tube end cap c) 4,500V low voltage transformer but with brightness higher than 7,000V normal transformer d) Circuit board designed with all kinds of safety measures 2) Model: BN-236248EX a) Neon tubes: 3\'\' x 2pcs, 4\'\' x 2pcs b) 9,000V extra bright transformer with imported neon gas tubes c) Protected circuit board d) Assorted mounting kit included