If you're looking for a quality analogue ballast, have a look at the iPac range. Each is made in the UK and comes with a 25 year warranty
The Sunmaster Digital range is affordable, versatile and reliable.
Ballasts from Lumatek, Adjust-A-Watt, MaxiBright and Gavita
Starting at: £69.99
Regular Price: £139.99
Special Price £119.99
Starting at: £80.00