Then my contributiion....
The "Eco-Bulb"
IN the early days this company brought out a replacement bulb for rear lights which had 3 LEDS
Simply replace your original bulb and extend battery life
Those were pretty good. I ran a really cheap rear dynamo light with one of those in for some time.
 
				 
 
		 
 
		 
		
 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 . I congratulated her on doing very well as I cycled past
 . I congratulated her on doing very well as I cycled past 
 
 
		 
 
		