CaptMike: I have tHe old daytime only with the 7.5 V battery charger and ordered a new battery for it a couple of years ago. Dinotte told me that the D6 is near the same brightness as the old daytime only light. The new daytime only is 33% brighter than the D6. I purchased the Quad red to use on touring trips but don't like the run time. I am considering the D6 for this now.I use the slow pulse which they now call the on off.