How many Transformers would be required for a particular Neon Signage?

Generally the number of Transformers is calculated by the following formula:

No. of Transformer = No. of Letters x Height of the Letter x K (constant)
30 or 35
Generally denominator is 30 when Neon gas is used and it is 35 when Argon gas is used. But for safer calculation average value of 32 is taken.

The value of the Constant K is taken as follows:

ii. K = 3, if it is single line Neon
iii. K = 5, if it is two line Neon
iv. K = 7, if it is three line Neon
v. K = 9, if it is four line Neon