A bunch of bright minds kicked around ideas on converting Whelens here:
Abitibi won the prize for follow through! A lot of the lighting tech has changed, too. Seems like the thin LED bar and a block off plate might be easiest these days.
Converting Whelen 900s/Similar Scene lighting to LED?
I've been looking for a replacement for some Whelen 900s on my Ambulance. I like the idea of a replacing the entire light, or the clear/red/amber lens with a flat plate with a cheaper LED light mounted in it. Or possibly an angled bracket. Some of the options from SuperbrightLED: -3.5"...
expeditionportal.com
Abitibi won the prize for follow through! A lot of the lighting tech has changed, too. Seems like the thin LED bar and a block off plate might be easiest these days.