When I got my 101 I thought it had great lights and I put it down to the high seating position looking down on things.
However then I got a rock through one light and I realised that I had H4 Halogens with 130/100w (24v) globes - sort of explained why I had such great lights.
I had trouble finding the 130w globes so just bunged in the 65w/60w globes and the lights are still OK.
As Mick said just go H4 Halogens - cheap and work well - actually I am surprised you do have them already.
Garry
				
			 
			
		 
			
				
			
			
				REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101 
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
			
			
		 
	
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