Philips Xtremevision +130

Price: £22.49 Beam: Not rated Contact: www.philips.com/automotive Rating: Not rated

ECE Reg37 specifies a 1,000-lumen maximum output for H4 bulbs and as the regulations were set in the sixties when manufacturing processes were not as precise as today, a 15 per cent tolerance was allowed. Makers seeking extra performance try to get as close to the 1,150-lumen limit as possible. Several bulbs here were over the 1,100 mark, but both Xtremevisions topped the limit; one by a big margin. As a result, we haven’t rated them. Still, they romped all the tests.