Cacti under Heat Lamps

At night the Arid Garden is only lit by very bright red heat lamps. It seems that because green does not reflect red light very well, I can either overexpose the spikes to where they have next to no details, or I can expose the spikes with some texture, but then get near pitch-black for the remaining portion of the cacti.

This is pretty much straight out of the camera, which was shot with daylight white balance. In the raw conversion I pulled the color temperature down a little to be cooler (Which helped get some texture back to the red colored spikes).

This was also shot with the Pentax-M 50mm f/1.4 + Tilt Adapter (which adapts Pentax-K lens to Micro-4/3rd).